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This is the weakness of PEMDAS/BEDMAS/ whatever mnemonic taught in school. There is no easy way to denote that D and M have the same priority, as do A and S.
My high school taught BEMA, which requires understanding that division is multiplying by the reciprocal and subtraction is adding the negative, but removes any potential implication of there being a specific order between those pairs.
/) They taught me PEMDAS by showing a video that absolutely showed it going P E M D A S instead of P E MD AS. I'm pretty sure that was elementary school, but I don't think they ever reataught it in middle/high school despite the fact that they were all part of the same district. I had to learn about it from some random flash game.
Because PEMDAS: Parenthesis then multiplication then division then addition then subtraction. This is wrong, of course, addition and subtraction are supposed to happen at the same time, but the acronym is misleading and this is a reasonable interpretation of it if you don’t have any other context (which you should)
Right. But if you have 100 - 0 X 4, you’d do multiplication first, so 0 X 4 = 0, 100 - 0 = 100. Here they think addition comes before subtraction, so 100 - 0 + 4, first do 0 + 4 = 4, then do 100 - 4 = 96
Literally had this same debate on another thread... Way too common.
Though, at least in the US, equations are usually 6th grade, which is (usually) middle school (sometimes elementary). Before that, most places only do 2 numbers with one operator.
Image how hard math would be if the operator worked that way.
100 apples, take away none, add 4, that's 104.
Oh but when written that's 100 -0 -(+4) => 100 --(+4) => 100+4
That's BTW interesting that mathematical notations have a history too. The notations and its rule evolved, in particular to avoid retarded cases like this one.
Lmao what are you talking about. How does "add 4" become -(+4)?
Also, you're not even solving the equation you set up correctly. "- 0" is just "- 0", the negative sign doesn't somehow carry over to the next part. You're literally making the same mistake as the person in the post is, even though you know the correct answer.
I think their problem was taking the 0 out entirely. Whether you subtract or add 0 has no affect on the overall solution, the zero just has to exist at all lol
They didn't take out the 0, their mistake was thinking there was an actual difference between addition and subtraction, and also adding in some imaginary brackets. In their mind, you do the addition before the subtraction which gives
100-0+4
Then, for some reason, they saw it as
100-(0+4)
When it should be
100+(-0)+4
In their defense pemdas does say addition first. I know multiplication and division happen simultaneously and so do addition and subtraction, but if you're having an off day you might forget that part.
That's why it should be PE(MD)(AS). Or they should just get rid of the acronym all together because clearly it just breeds confusion since people remember the acronym for way longer than they remember exactly what it means.
This is so wild to me. In Germany, we just learn "Punkt vor Strich", which means something like "Dot before Line" because our Operators for Addition and Subtraction are made of lines (+ and -), while our operators for multiplication and division are dots (⋅ and : )
I don't think I've ever encountered someone who thought that addition precedes subtraction or multiplication precedes division. There are dumbasses who just do an equation from left to right tho... can't fix stupid I guess.
It doesn't. If You have two things at the same order, You have to list one first and other one after. You can't have them both at the same time. It's physically impossible. That's the only reason why they are listed that way.
It doesn't have to be left to right. You could throw all the numbers into a hat and then pull them out one at a time adding them together. Addition doesn't care about the order (3+5+4+2 is the same Ame as 2+4+3+5) and, as mentioned, subtraction is just the addition of a negative number. Addition and subtraction all happen at the same instant, the human brain just isn't great at doing it all at once so we break it up along the way.
Yo, i struggled mightily with math and i still think back on the pemdas rule trying to understand order of operations. Trying to remember the rules and simple math errors killed me often. I still remember the horror when a college prof had us learn to use foil/pemdas in reverse to solve polynomials. So many simple mistakes that i made in the process that were addition/subtraction related, looking back on it. That professor did preach consistency in effort, and wanted us to see a tutor if we struggled, but after having difficulty with math since being a kid, didnt really have much hope for the idea. I guess what im trying to say is some of us create our own problems.
That’s exactly what they did. Even then, their logic was wrong. Because if you had to do the addition simultaneously or first or whatever he said. Then 100-0+4 should have been 100+4-0= 104. But that’s the problem with people making up their own rules and logic it’s inconsistent and they can’t possibly defend it
Well if you do addition before subtracting then it makes sence to do 0+4 before 100-0 since the first is addition which "you do first" again that's wrong since you don't do addition before subtracting but still, it's an honest mistake. Still definitely belongs here.
Addition before subtraction isn't the issue.
The problem is
100-0+4
People seem to think 0+4 would happen, if you add first and the negative sign would be left.
It wouldn't, 100+4 will happen first then 104-0 which would give 104.
You don't just take the number and ignore the sign, the sign isn't separate it's a part of the number.
There is no just 0, the 0 in this case is being subtracted, hence it's a -0.
So, either
100-0+4
(100-0)+4 or 100 + (-0+4), both will give the same result
100+4
104
I'm adding before subtracting, I'm not asking you to do it the same way.
There's nothing wrong with adding before subtracting, because it's the same as subtracting before adding. Both are the same thing just put differently.
-0+4 or 4-0 or 4+ (-0), it doesn't matter.
It's just one way of doing things, you can do it however you want.
>People seem to think 0+4 would happen, if you add first and the negative sign would be left.
Yes, because that's literally what you are suppose to do. Negative sign matters only if the number has a value - because it's the value that is either negative or positive (not the number itself).
0 is neither. -0 and +0 is the same exact thing, and gives the same result.
>You don't just take the number and ignore the sign, the sign isn't separate it's a part of the number.
Yes, that's normally true. The problem with your argument, is that - when it comes to substraction and addition - 0 is literally the only exception from that rule.
>There is no just 0, the 0 in this case is being subtracted, hence it's a -0.
Yes, it is substracted. But there is no such thing as -0. You can't have a negative of a number that has no value...
Whether you substract or add the 0, it still changes nothing.
The only situation with the Zero, where you would take the sign into account, is if it would be outside of the brackets, like this: -(0+4) because then you would get
-(0+4) = -(4) = -4 |or| -(0+4) = (0-4) = -4
but that's not what happens within 100-0+4.
***TL;DR: so while yes, it would give the same result - that's not how the Zero works...***
Please don’t crucify me I’m just wondering if the parentheses were not there why the answer would not be 4. 50+50=100-25=75x0=0+2+2=4. I’m not confident in that answer just wondering why it wouldn’t be right if the parentheses were not there
You have got the groups mixed up. The original is:
50 + 50 - 25 * 0 + 2 + 2
You can also write this as
50 + 50 + (-25 * 0) + 2 + 2
You do multiplications first, which is
50 + 50 + (-25 * 0) + 2 + 2
That middle bracketed term equals zero so:
50 + 50 + 0 + 2 + 2
which becomes 104.
And what you don't seem to understand is that when you multiply by zero, the answer is zero, that means that it reduce to fucking 2 + 2, the answer to that entire equation is 4.
Except you don't just read the equation from left to right. That's what the order of operations (PEMDAS, BODMAS, whatever other acronym you learnt in primary/elementary school was) is all about.
First, you tackle what's in the brackets/parentheses. In this case, we don't have any so we can move on to the next step.
Next is the exponents/ordinals. This refers to things to the power of, such as squaring (x², etc). Again, we don't have that here.
The next step is multiplication/division. You can do that either way around because division is just the same as multiplying by a fraction (i.e. dividing by 2 is the same as multiplying by ½). In this equation we have one multiplication to do: 25×0. As you correctly pointed out, anything multiplied by 0 is 0 and so after doing that, our equation now reads:
50+50+0+2+2
The final step is addition/subtraction. Again, the order of this is irrelevant since subtraction is just the addition of a negative number (i.e. subtracting 2 is the same as adding -2). It doesn't matter what order the numbers are written in, our next stage is just to add all the numbers together which gives us 104.
Edit: If the equation was
(50+50-25)×0+2+2
You'd be absolutely correct
Thank you for the lengthy description of what should have been a very simple explanation, since the equation as presented had a very simple expression and solution, and the answer is still 4, so thank you for explaining to me what I already knew.
Ok. Well done for being too ignorant to actually read the explanation. The fact that you still think the answer is 4 is exactly why I provided a lengthy explanation. You apparently still don't understand the order of operations, a thing that is taught to children, and I'd love to see your explanation of how this is 4.
I’m not saying any adult shouldn’t know this, but the “AND” part was absolutely an afterthought in the lesson. I figured it out by like 5th grade but the lesson plan (at least in my experience) didn’t specify it’s parenthesis then exponents, then multiplication OR division (left to right), and then addition OR subtraction (left to right). The first first pair isn’t interchangeable with each other, the second per is interchangeable with each other, and the third pair is interchangeable with each other.
Actually, when you write it that way without using parentheses is when it can become confusing (which is why writing it that way via text is considered improper). The problem is that we use / as fraction line as well as division operator. If it’s being used as a fraction line the equation should be written as either (6/3)x2 OR 6/(3x2) for maximum clarity. Note, without parentheses, the standard understanding is (6/3)x2.
In reality, the equation should be written 6 ÷ 3 x 2
In which case it become clear that are two operations that are performed on the base number (6)
When we speak of the order not mattering you can divide six by three then multiply the result by to OR you can multiply six by two and then divide result by three and get the same result either way
It looks like you've lost track of the calculation because of the distraction of the fraction bar. The person you're replying to is using the calculation:
* 6 divided by 3 multiplied by 2
It matters which order you divide or multiply. 6 divided by 3 is 2, multiplied by 2 is 4 OR 3 multiplied by 2 is 6, 6 divided by 6 is 1.
>When we speak of the order not mattering you can divide six by three then multiply the result by to OR you can multiply six by two and then divide result by three and get the same result either way
No one in this thread is talking about the order of the digits not mattering, they're talking about the order of operations. You've changed the order of the digits so it's not the same things being multiplied or divided.
Except what you’ve just stated is NOT properly evaluating the order of operations.
The two operations here are:
1) divided by 3
2) multiplied by 2
Order of operations is linked to the commutative property of mathematics.
Multiplying 3x2 is an inherent violation of order of operations/ commutative properties. Or more specifically, it’s a misidentification for the base number the operation is applied to. That’s the point.
I'm sorry, but commutativity has nothing to do with it. The reason that you should not multiply 3 by 2 first is simply that both division and multiplication, by convention, are both left associative and have the same priority.
Sorry if I insist, but it isn't.
The expression is, including the parentheses, (6/3)\*2; now, division is non commutative, which means that this is not equivalent to (3/6)\*2; product is commutative, and so this is equivalent to 2\*(6/3). But none of this considerations changes the order between the operations.
What decides the order of the operations is associativity and priority.
Priority decides which operators are executed first; associativity decides how to group the operations in case the priority is the same.
Now, multiplication and division are both left associative; multiplication is an associative operation, and so is also right associative. That's the reason (2\*3)\*4 is the same as 2\*(3\*4). Again, nothing to do with commutativity!
Sorry if this seems pedantic, but as we're talking about a pretty "technical" issue, I think it was worth a bit of detail.
The parentheses actually weren't part of the original problem, the other person added them while solving the problem, which is extra funny because it proves they KNEW how the grouping worked
I actually understand what's happening here. It's a problem with saying PEMDAS cause it makes it seem like you do Multiplication before division and addition before subtraction.
This one's better than most, but I tend to agree with you.
Even when they're written well I'm still tired of seeing them, though. They're like half of this sub.
More likely is that he's making the common mistake that addition gets precedence over subtraction and is reading it as 100-(0+4). Some people make that mistake on their own but I've seen a lot people say that they were actually *taught* to do that.
It's bold trying to correct people in confidently incorrect.
I would stop, take a double check, and make sure I read up on the subject; and then maybe still not bother.
People are weirdly stubborn about PEMDAS here. When you have an equation like a/b(c) it produces 2 valid results, I shared sources from Harvard and Berkeley on this and people still went "nah, I learned this as a kid so I know more than a Harvard math professor."
Of all the hills to die on, why that one?
> When you have an equation like a/b(c) it produces 2 valid results
When you have an equation like that, whoever wrote it is an idiot who wants to be misunderstood.
Proper notation would show one and only one of these:
- `a` over a horizontal line, itself over `b(c)` or `bc`
- `a` over a horizontal line, itself over `b`, with the `(c)` or `c` on the right side aligned with the horizontal line
- `a/b*c`
The last two are, of course, equivalent.
That isn't true at all. Some calculators give implicit multiplication higher precedence.
For example for that problem that most people have probably seen on facebook `6/2(1+2)` a TI-85 calculator says the answer is 1. Most HP calculators say 9. This is because a TI-85 gives implicit multiplication higher precedence.
It isn't unreasonable to give implicit multiplication higher precedence. This is why it is best to write formulas without ambiguity.
That just means some calculators can handle the problem and others can’t
The whole system breaks apart if there’s more than one answer no ?
But I guess with more advanced math pov simple problems turn out to be written wrong then
> The whole system breaks apart if there’s more than one answer no ?
Not really, the manual for scientific calculators document their precedence rules. So it is wise to read them in the manual (especially regarding how they handle implicit multiplication).
I saw someone complain about PEMDAS posts being too common and wondered what the fuss was about.
Now a few days later, it seems like I have seen nothing *but* PEMDAS posts. Now we are getting recursive, with posts spawned from other confidentlyincorrect posts about PEMDAS. So I agree with you.
seriously, not only are the posts too common and boring, but the original expressions are designed to be confusing and not written like any normal human would write one.
PEMDAS is contemporary convention, but convention has been different at different times and in different areas, among other things. But this one isn't ambiguous at all. Every order of operations I've ever seen would produce the same result.
I think the issue people have with PEMDAS is less that it's ambiguous and more that the viral "math problems" people fight over use stuff like the ➗ sign which would never be used in a real math problem. Also PEMDAS is basically never used past like 5th or 6th grade because there are much clearer ways of notating math
I’ve seen this claim a lot, but I recall seeing that division symbol in real math problems all through my school career. It’s not on my phone’s keyboard, but I absolutely saw it in school, both in books and on the board.
Just out of curiosity what kind of math classes did you take in school because once you get to algebra you should not be seeing the division symbol, everything should be expressed in fractions.
Yeah, no expression is ambiguous, that's a feature of the writing system. Any well-formed expression involving numbers and `+ - × / ^ ( )` can be parsed to a single number (or be undefined if division by zero occurs), for instance enter the expression in a Python shell (replace `^` by `**` though).
Some expressions might *look* ambiguous, especially those involving the ÷ or / sign which nobody uses past middle school (except when writing inline equations online or in a programming language), when you use actual fraction bars all problems go away.
But you have to know the writing system's syntax. There are expressions that there are legitimate differences in how they should be applied. (But non in OP's expression).
The big one is if implied multiplication, aka multiplication by juxtaposition takes precedence over explicit multiplication.
The only beef I have is everyone calling it PEDMAS and not BEDMAS
you fuckers saying "parenthesis a + b paranthesis" instead of "bracket a + b bracket"?!?!
It’s a US thing. Brackets are typically only square brackets here,; the curved ones are called parentheses because they set aside a parenthetical in writing.
Really? Enter this in a TI-85 calculator: `6/2(1+2)`
Then enter that in a HP calculator. Now tell me if the calculators gave the same answer.
Some calculators give implicit multiplication higher precedence. And this is fine as long as it is documented and indeed all scientific calculators document their precedence rules.
It's so fucking wild to me that people can't calculate such simple math problems. And then others just parrot that these problems are made ambiguous on purpose. Like no, nothing here is ambiguous. It's a simple calculation that 8 year olds should be able to solve
Sure, but it's also the sort of thing that adults don't normally ever have to do, so it's not surprising the school kids do it more reliably. All of these posts are just ragebait generating engagement for social media attention farms.
I’m doing a PhD in astrophysics and I struggle with this shit lmao. Granted I don’t have to do a lot of maths on paper anymore, so I just always check on a calculator on the small number of times I do have to…
Maths is hard!
It's simple addition and subtraction. No adult should struggle with that, no matter how rarely they have to do this. Unless they have legitimate brain damage
I'm not talking addition/subtraction, I'm talking about the whole thing. PEMDAS gotcha posts are a plague on boomer social media because most people live lives free of any math more complex than basic single step calculations.
Actually With PEMDAS from what i was told is that if there is only addition/subtraction left you work left to right. So OP you are correct.
PEMDAS is saying
Parentheses,
Exponents,
Multiplication and/or Division,
Addition and/or subtraction.
Work left to right.
Edit: Forgot to put in the and/or
Left to right is a convention but it isn't actually a rule, you can freely rearrange the terms in whatever order you'd like. That's a huge part of math.
The "left to right" argument comes from things like a/b(c) where you have an ambiguous notation and you need to guess what the author meant by hoping they follow the same writing conventions they would in English.
Unfortunately, this math makes sense if I take some old math classes literally. When I was taught order of operations, I was taught PEMDAS. With this you have to do ALL of one operator before moving to the next.
Problem: 50 + 50 - 25 x 0 + 2 + 2
So, first you do all Parentheses. So, from their post, we can skip.
Then, you do all Exponents. So, skip in this problem.
Then, Multiplication.
50 + 50 - 0 + 2 + 2
We can skip Division as it is not present.
Then, you do all Addition.
100 - 4
Finally, you do all Subtraction.
96
I know this is wrong (and most people do), but I see where this could easily happen when taking some lessons literally.
I saw people using the term BODMAS and was confused as to what the letters each stood for (I learned it as PEMDAS), so thank you for teaching me about BODMAS.
I was taught GEMA:
Grouping
Exponents
Multiplication
Addition
With the assumption being that division is just a type of multiplication and subtraction is just a type of addition. Division and subtraction aren't part of the acronym because they aren't actually a unique process.
It helps that when I was learning it (second grade) the teacher drew a little "GEMA monster" to help remember it.
Nowadays, I am old enough to realize that the monster was actually just the yeti from SkiFree.
Good on you. 3rd graders in my city are still learning how to count by blocks of tens and 100s. I wish public schools here would/could teach science and math topics at a faster pace. Growing up, my friends family homeschooled and I was learning the same topics as his brother 2 years younger than us.
Don't worry - We also have BIDMAS here in the UK - where instead of Order (and from one teacher who didn't want to explain what order meant pOwer which is interesting) we used indecies to represent exponents.
Basically maths is confusing.
Addition happens first if the additional function comes first. It's not that you do all the multiplication, then all the division, the all the additional, then all the subtraction. You do the multiplication and division steps in the same process but in order. And similarly you do the addition and subtraction in one process with whatever symbols come first. And easier way to think of it, id you really want to do addition first, is to stop thinking of it as subtraction. Think of it as adding negative numbers. So if it's 50+50-0+4+4, it'd be 50+50+(-0)+4+4. Then you can do all the additional at once and you don't mess things up.
Hope this helped some people cuz it seemed to help others in college that didn't pick it up in jr/Sr high.
He says “addition comes first” which makes me think that he is reading PEMDAS as one long list. Like P then E then M then D then A then S. It’s surprisingly common for people to make this mistake.
PEMDAS should really be read like PE(MD)(AS). Because multiplication and division are in the same “tier” of importance, they are done from left to right instead of M first then D. Same with AS. I assume most people here know that, but if you ever see someone making this same mistake in the wild that could be the explanation.
You’d just confuse people with the parentheses. I get what you’re saying, but never underestimate the power of an ignorant person.
You can idiotproof all you want, but the world will just make better idiots.
Okay, I just want to be honest and say that I am *appalling* at math and I *did* have to read this through a couple of times. But it clicked even for me and even I’m just like “bruh… no.”
Usually it's their order of operations that is how they get the wrong answer.
But somehow going from 100-0+4 to 100-4 is on a whole other level of stupidity.
I think I see the mistake they are making. If there is just a - next to a +, it becomes negative. Or in some cases at least. So they are forgetting 0 is a number here.
I think they are looking at it like after the multiplication it becomes 100- (+4). Mistaken that the 0 is there and is what the - is attached to.
Or maybe I am giving them too much credit. That is always possible on the internet.
According to them (they responded after I posted this) they typically read right to left in their country and that's where the mistake came from. Idk how that leads to how they did this problem though.
Yeah that shouldn't make a difference. That is one of the reasons we standardize how math is done. Sounds like an excuse. Again, I think they just forgot the 0 was a real number attached to the - as that would give the answer they got. Makes the most sense.
I thought it was because if you treat plus to minus like multiplication to plus (kind of how PEMDAS) implies, you would get for example
a+b+c-d+e=(a+b+c)-(d+e).
Also if multiplication binds stronger why is 1/2×3≠1/6 as ultiplication is stronger.
That is just my basic inerpretation of what PEMDAS would say. I gues it's supposed to mean P>E>M,D>A,S. Still find it weird. Just say PEMA and introduce the concept of subtraction and division just as forms of addition and multiplication. Or don't use a acronym at all. I'm glad anyways not to have had it learn this way.
There is none of those things in this equation lmao
the P in PEMDAS is for parentheses. 25x0 is zero. So now it’s just 50+50=100.
100-0= 100.
100+4=104.
At least with this guy you can see where they got it from. PEMDAS ends with Addition AND Subtraction happening from left to right in the equation, but if you read left to right like they probably did you would do the same. So often I see someone do addition/subtraction before multiplication/division. But yeah no this dude should pay attention when the teacher says A&S happen together
thing is, he said "addition happens first" and then does multiplication first, he does 99% of it correctly and then thinks -0+4 is -4
how can someone be so close to being right and then just be completely wrong, it almost feels like trolling
This is a good version of it, but I am really sick of seeing PEMDAS... it's one niche bit of arithmetic and it feels like it's about 50% of the posts here
That’s the problem with teaching acronyms. They can be misinterpreted/misunderstood or misremembered. Why do we keep teaching children silly little tricks instead of the logic behind it. Why don’t we teach, but make them memorise?
I am sure there is a great reason for why we continue it, but I just can’t see it.
God, I hate the "Addition comes first!" crowd. They really think that because PEMDAS lists addition before subtraction, that means that addition must always come before subtraction. I had this argument with my mom about it and she refused to believe it goes left to right even after I looked it up online and confirmed it.
just say:
PEMDAS
BODMAS
They both have differences in division and multiplication, why is that? Because you're supposed to evaluate from left to right, doesn't matter between Addition and Subtraction nor Multiplication or Division, since they have the same order as eachother.
Ah, thank you for clarifying. I was fully ready to accept that there was yet another person commenting the wrong answer/method under a confidentlyincorrect post
Saw a great video the other day about why PEMDAS is bad and should be PEJMDAS instead. Because what usually screws people up is not doing implied juxtapositions which take priority over multiplication and division left to right.
There is no such rule as addition comes first. There is no difference between 10 + 2 - 1 and 10 - 1 + 2. Both gives the same result. Which is obviously 11. Also the guy treated the part of the equation as if there were brackets.
Maybe he'd understand a middle school math one day. Also what middle school? It's **elementary school math**. Especially that he can't even add or subtract. Both multiplications and divisions are elementary school math. So are brackets.
It’s a result of the PEMDAS mnemonic. Addition and subtraction happen at the same precedence, but the A precedes S in PEMDAS, which makes the incorrecter think addition has precedence. So they interpret the expression as `(50+50)-((0x25)+2+2)`, which would result in 96.
I'm dutch and I'm not sure if this has happened in other countries aswell. My parent were taught to do:
Power > multiplication > division > root > addition > subtraction
I was taught to do:
Power + root > multiplication + division > addition + subtraction. Operators on the same level are done left to right.
Looking at the dutch wikipedia page (can't find from scanning the English one) this order really has changed in the last couple decades. So people who het this wrong are just old and not up to date. Don't hate on them, educate them.
I don't know if at this point I can really go with the education system having fail us, or that people are so FUCKING STUPID that they can't learn shit no matter how long they have been taught about it.
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In what uneducated country is that middle school math? You have 100 apples, take away none, add 4
yea but you see, you added four after you took away none so now you gotta take away four
Communism
This caught me by surprise so much that I just started laughing... I need help lol.
r/unexpectedcommuism
How does even this misspelled sub exists for 3 years ?!??!?!?!!
It hardly “exists.” It has one post made three years ago and 8 members who’ve contributed nothing since.
Correct!
uh no? you've added 4 and taken away 0, so CLEARLY you have to take away 8. simple math people
European taxes?
Yep and us taxed 50 apples
Dude really got confused when this happened "-+"
This is the weakness of PEMDAS/BEDMAS/ whatever mnemonic taught in school. There is no easy way to denote that D and M have the same priority, as do A and S.
My high school taught BEMA, which requires understanding that division is multiplying by the reciprocal and subtraction is adding the negative, but removes any potential implication of there being a specific order between those pairs.
To be fair it shouldn't matter this person also just added wrong.
[удалено]
underrated
/) They taught me PEMDAS by showing a video that absolutely showed it going P E M D A S instead of P E MD AS. I'm pretty sure that was elementary school, but I don't think they ever reataught it in middle/high school despite the fact that they were all part of the same district. I had to learn about it from some random flash game.
I believe by doing addition first he’s doing 100-(0+4) and then 100-4, god knows why 🤷♂️
Because PEMDAS: Parenthesis then multiplication then division then addition then subtraction. This is wrong, of course, addition and subtraction are supposed to happen at the same time, but the acronym is misleading and this is a reasonable interpretation of it if you don’t have any other context (which you should)
The thing is there aren't any parenthesis in that equation. It was literally "100 - 0 + 4".
Right. But if you have 100 - 0 X 4, you’d do multiplication first, so 0 X 4 = 0, 100 - 0 = 100. Here they think addition comes before subtraction, so 100 - 0 + 4, first do 0 + 4 = 4, then do 100 - 4 = 96
This is why it should be written `PE(MD)(AS)`
Literally had this same debate on another thread... Way too common. Though, at least in the US, equations are usually 6th grade, which is (usually) middle school (sometimes elementary). Before that, most places only do 2 numbers with one operator.
Big hands or small apples?
Image how hard math would be if the operator worked that way. 100 apples, take away none, add 4, that's 104. Oh but when written that's 100 -0 -(+4) => 100 --(+4) => 100+4 That's BTW interesting that mathematical notations have a history too. The notations and its rule evolved, in particular to avoid retarded cases like this one.
Lmao what are you talking about. How does "add 4" become -(+4)? Also, you're not even solving the equation you set up correctly. "- 0" is just "- 0", the negative sign doesn't somehow carry over to the next part. You're literally making the same mistake as the person in the post is, even though you know the correct answer.
"Imagine how hard math would be if the operator worked that way"
r/MURICA
It's BODMAS Brackets, Operation, divide, multiply, addition, subtraction Therefore 100 - 0 + 2 +2 100 - (0 + 2 +2) 100 - 4 96
50+50-25×0+2+2 50+50+(-25×0)+2+2 100+0+4 104 What that person doesn't seem to understand is that subtracting is just adding a negative number
I think their problem was taking the 0 out entirely. Whether you subtract or add 0 has no affect on the overall solution, the zero just has to exist at all lol
They didn't take out the 0, their mistake was thinking there was an actual difference between addition and subtraction, and also adding in some imaginary brackets. In their mind, you do the addition before the subtraction which gives 100-0+4 Then, for some reason, they saw it as 100-(0+4) When it should be 100+(-0)+4
In their defense pemdas does say addition first. I know multiplication and division happen simultaneously and so do addition and subtraction, but if you're having an off day you might forget that part.
That's why it should be PE(MD)(AS). Or they should just get rid of the acronym all together because clearly it just breeds confusion since people remember the acronym for way longer than they remember exactly what it means.
This is so wild to me. In Germany, we just learn "Punkt vor Strich", which means something like "Dot before Line" because our Operators for Addition and Subtraction are made of lines (+ and -), while our operators for multiplication and division are dots (⋅ and : ) I don't think I've ever encountered someone who thought that addition precedes subtraction or multiplication precedes division. There are dumbasses who just do an equation from left to right tho... can't fix stupid I guess.
That’s why pemdas is taught alongside the commutative properties of multiplication/ division and addition / subtraction
It doesn't. If You have two things at the same order, You have to list one first and other one after. You can't have them both at the same time. It's physically impossible. That's the only reason why they are listed that way.
you misunderstand, Addition & Subtration happen at the same time as in you go through left to right and do all the addition AND subtraction
It doesn't have to be left to right. You could throw all the numbers into a hat and then pull them out one at a time adding them together. Addition doesn't care about the order (3+5+4+2 is the same Ame as 2+4+3+5) and, as mentioned, subtraction is just the addition of a negative number. Addition and subtraction all happen at the same instant, the human brain just isn't great at doing it all at once so we break it up along the way.
Yo, i struggled mightily with math and i still think back on the pemdas rule trying to understand order of operations. Trying to remember the rules and simple math errors killed me often. I still remember the horror when a college prof had us learn to use foil/pemdas in reverse to solve polynomials. So many simple mistakes that i made in the process that were addition/subtraction related, looking back on it. That professor did preach consistency in effort, and wanted us to see a tutor if we struggled, but after having difficulty with math since being a kid, didnt really have much hope for the idea. I guess what im trying to say is some of us create our own problems.
That’s exactly what they did. Even then, their logic was wrong. Because if you had to do the addition simultaneously or first or whatever he said. Then 100-0+4 should have been 100+4-0= 104. But that’s the problem with people making up their own rules and logic it’s inconsistent and they can’t possibly defend it
Well if you do addition before subtracting then it makes sence to do 0+4 before 100-0 since the first is addition which "you do first" again that's wrong since you don't do addition before subtracting but still, it's an honest mistake. Still definitely belongs here.
It's not an honest mistake when he's screaming at someone about not understanding it and not double checking.
Addition before subtraction isn't the issue. The problem is 100-0+4 People seem to think 0+4 would happen, if you add first and the negative sign would be left. It wouldn't, 100+4 will happen first then 104-0 which would give 104. You don't just take the number and ignore the sign, the sign isn't separate it's a part of the number. There is no just 0, the 0 in this case is being subtracted, hence it's a -0. So, either 100-0+4 (100-0)+4 or 100 + (-0+4), both will give the same result 100+4 104
Well yes we agree on the problem but thinking 0+4 would happen first IS thinking addition happens before subtracting
I'm adding before subtracting, I'm not asking you to do it the same way. There's nothing wrong with adding before subtracting, because it's the same as subtracting before adding. Both are the same thing just put differently. -0+4 or 4-0 or 4+ (-0), it doesn't matter. It's just one way of doing things, you can do it however you want.
>People seem to think 0+4 would happen, if you add first and the negative sign would be left. Yes, because that's literally what you are suppose to do. Negative sign matters only if the number has a value - because it's the value that is either negative or positive (not the number itself). 0 is neither. -0 and +0 is the same exact thing, and gives the same result. >You don't just take the number and ignore the sign, the sign isn't separate it's a part of the number. Yes, that's normally true. The problem with your argument, is that - when it comes to substraction and addition - 0 is literally the only exception from that rule. >There is no just 0, the 0 in this case is being subtracted, hence it's a -0. Yes, it is substracted. But there is no such thing as -0. You can't have a negative of a number that has no value... Whether you substract or add the 0, it still changes nothing. The only situation with the Zero, where you would take the sign into account, is if it would be outside of the brackets, like this: -(0+4) because then you would get -(0+4) = -(4) = -4 |or| -(0+4) = (0-4) = -4 but that's not what happens within 100-0+4. ***TL;DR: so while yes, it would give the same result - that's not how the Zero works...***
They said 100-0+4 is 96 .. my 8yo understands math better lol
Please don’t crucify me I’m just wondering if the parentheses were not there why the answer would not be 4. 50+50=100-25=75x0=0+2+2=4. I’m not confident in that answer just wondering why it wouldn’t be right if the parentheses were not there
With or without parenthesis, you do multiplication first.
I see. Makes way more sense then how I was thinking
People, in universities at least, usually make a point to use parentheses anyway because it's easier to read.
You have got the groups mixed up. The original is: 50 + 50 - 25 * 0 + 2 + 2 You can also write this as 50 + 50 + (-25 * 0) + 2 + 2 You do multiplications first, which is 50 + 50 + (-25 * 0) + 2 + 2 That middle bracketed term equals zero so: 50 + 50 + 0 + 2 + 2 which becomes 104.
Ok. Thanks. I was going sequential I think as if I was putting it in a calculator step by step. I could use an algebra brush up lol
It's not algebra....... it's basic math......
And what you don't seem to understand is that when you multiply by zero, the answer is zero, that means that it reduce to fucking 2 + 2, the answer to that entire equation is 4.
Except you don't just read the equation from left to right. That's what the order of operations (PEMDAS, BODMAS, whatever other acronym you learnt in primary/elementary school was) is all about. First, you tackle what's in the brackets/parentheses. In this case, we don't have any so we can move on to the next step. Next is the exponents/ordinals. This refers to things to the power of, such as squaring (x², etc). Again, we don't have that here. The next step is multiplication/division. You can do that either way around because division is just the same as multiplying by a fraction (i.e. dividing by 2 is the same as multiplying by ½). In this equation we have one multiplication to do: 25×0. As you correctly pointed out, anything multiplied by 0 is 0 and so after doing that, our equation now reads: 50+50+0+2+2 The final step is addition/subtraction. Again, the order of this is irrelevant since subtraction is just the addition of a negative number (i.e. subtracting 2 is the same as adding -2). It doesn't matter what order the numbers are written in, our next stage is just to add all the numbers together which gives us 104. Edit: If the equation was (50+50-25)×0+2+2 You'd be absolutely correct
Thank you for the lengthy description of what should have been a very simple explanation, since the equation as presented had a very simple expression and solution, and the answer is still 4, so thank you for explaining to me what I already knew.
Ok. Well done for being too ignorant to actually read the explanation. The fact that you still think the answer is 4 is exactly why I provided a lengthy explanation. You apparently still don't understand the order of operations, a thing that is taught to children, and I'd love to see your explanation of how this is 4.
This person's trying to teach people middle school maths, while not understanding junior school maths.
What is junior school?
Parantheses, Exponents, Multiplication AND Division, Addition AND Subtraction.
I’m not saying any adult shouldn’t know this, but the “AND” part was absolutely an afterthought in the lesson. I figured it out by like 5th grade but the lesson plan (at least in my experience) didn’t specify it’s parenthesis then exponents, then multiplication OR division (left to right), and then addition OR subtraction (left to right). The first first pair isn’t interchangeable with each other, the second per is interchangeable with each other, and the third pair is interchangeable with each other.
It actually doesn't matter whether you multiply or divide first. If I'm not mistaken, you will always get the same result.
It does; 6/3*2 has different results depending on the order of division and multiplication
Actually, when you write it that way without using parentheses is when it can become confusing (which is why writing it that way via text is considered improper). The problem is that we use / as fraction line as well as division operator. If it’s being used as a fraction line the equation should be written as either (6/3)x2 OR 6/(3x2) for maximum clarity. Note, without parentheses, the standard understanding is (6/3)x2. In reality, the equation should be written 6 ÷ 3 x 2 In which case it become clear that are two operations that are performed on the base number (6) When we speak of the order not mattering you can divide six by three then multiply the result by to OR you can multiply six by two and then divide result by three and get the same result either way
It looks like you've lost track of the calculation because of the distraction of the fraction bar. The person you're replying to is using the calculation: * 6 divided by 3 multiplied by 2 It matters which order you divide or multiply. 6 divided by 3 is 2, multiplied by 2 is 4 OR 3 multiplied by 2 is 6, 6 divided by 6 is 1. >When we speak of the order not mattering you can divide six by three then multiply the result by to OR you can multiply six by two and then divide result by three and get the same result either way No one in this thread is talking about the order of the digits not mattering, they're talking about the order of operations. You've changed the order of the digits so it's not the same things being multiplied or divided.
Except what you’ve just stated is NOT properly evaluating the order of operations. The two operations here are: 1) divided by 3 2) multiplied by 2 Order of operations is linked to the commutative property of mathematics. Multiplying 3x2 is an inherent violation of order of operations/ commutative properties. Or more specifically, it’s a misidentification for the base number the operation is applied to. That’s the point.
I'm sorry, but commutativity has nothing to do with it. The reason that you should not multiply 3 by 2 first is simply that both division and multiplication, by convention, are both left associative and have the same priority.
I think we’re saying the same thing. Multiplying 3x2 is a violation of the cumulative property of multiplication/division.
Sorry if I insist, but it isn't. The expression is, including the parentheses, (6/3)\*2; now, division is non commutative, which means that this is not equivalent to (3/6)\*2; product is commutative, and so this is equivalent to 2\*(6/3). But none of this considerations changes the order between the operations. What decides the order of the operations is associativity and priority. Priority decides which operators are executed first; associativity decides how to group the operations in case the priority is the same. Now, multiplication and division are both left associative; multiplication is an associative operation, and so is also right associative. That's the reason (2\*3)\*4 is the same as 2\*(3\*4). Again, nothing to do with commutativity! Sorry if this seems pedantic, but as we're talking about a pretty "technical" issue, I think it was worth a bit of detail.
As much as I hate these questions I can't even criticize this one because the parentheses are *right there.*
The parentheses actually weren't part of the original problem, the other person added them while solving the problem, which is extra funny because it proves they KNEW how the grouping worked
Lol I was arguing with the exact same person
I actually understand what's happening here. It's a problem with saying PEMDAS cause it makes it seem like you do Multiplication before division and addition before subtraction.
Pain Probably also bait, but either way pain.
Judging by the way they've responded since the stuff in this post, I think they're genuine.
This dude literally had the numbers right and just decided to subtract instead of add. Like I cannot wrap my head around it.
I hate these questions because no one would ever write an equation the way they're shown.
This one's better than most, but I tend to agree with you. Even when they're written well I'm still tired of seeing them, though. They're like half of this sub.
Yeah. Maybe this one could be the result of filling in some basic series of variables, but we're all adults here; just use Excel.
Why not? They are trivial to solve. Yeah it’s messy but it’s perfectly correct.
He wrote “100-0+4” and then still failed to see that he subtracts zero from 100
More likely is that he's making the common mistake that addition gets precedence over subtraction and is reading it as 100-(0+4). Some people make that mistake on their own but I've seen a lot people say that they were actually *taught* to do that.
I was confused how he got 96, but that is a good explanation and clears it up.
It's bold trying to correct people in confidently incorrect. I would stop, take a double check, and make sure I read up on the subject; and then maybe still not bother.
People are weirdly stubborn about PEMDAS here. When you have an equation like a/b(c) it produces 2 valid results, I shared sources from Harvard and Berkeley on this and people still went "nah, I learned this as a kid so I know more than a Harvard math professor." Of all the hills to die on, why that one?
> When you have an equation like a/b(c) it produces 2 valid results When you have an equation like that, whoever wrote it is an idiot who wants to be misunderstood. Proper notation would show one and only one of these: - `a` over a horizontal line, itself over `b(c)` or `bc` - `a` over a horizontal line, itself over `b`, with the `(c)` or `c` on the right side aligned with the horizontal line - `a/b*c` The last two are, of course, equivalent.
In Canada I was taught BEDMAS. (Brackets)
In the UK I was taught BIDMAS. (Indices)
That's the same system but with different terminology.
Indeed, was just trying to imply that fact.
Equation don’t produce multiple results unless they’re written wrong
That isn't true at all. Some calculators give implicit multiplication higher precedence. For example for that problem that most people have probably seen on facebook `6/2(1+2)` a TI-85 calculator says the answer is 1. Most HP calculators say 9. This is because a TI-85 gives implicit multiplication higher precedence. It isn't unreasonable to give implicit multiplication higher precedence. This is why it is best to write formulas without ambiguity.
That just means some calculators can handle the problem and others can’t The whole system breaks apart if there’s more than one answer no ? But I guess with more advanced math pov simple problems turn out to be written wrong then
> The whole system breaks apart if there’s more than one answer no ? Not really, the manual for scientific calculators document their precedence rules. So it is wise to read them in the manual (especially regarding how they handle implicit multiplication).
Some people need a 
I really wish we could ban PEMDAS shit from this sub
I saw someone complain about PEMDAS posts being too common and wondered what the fuss was about. Now a few days later, it seems like I have seen nothing *but* PEMDAS posts. Now we are getting recursive, with posts spawned from other confidentlyincorrect posts about PEMDAS. So I agree with you.
seriously, not only are the posts too common and boring, but the original expressions are designed to be confusing and not written like any normal human would write one.
This one literally had brackets. This isn't a PEMDAS post, this is a moron who doesn't know how subtraction works.
INB4 some dumbass says it's ambiguous even though PEMDAS already covers all of the so called exceptions they'll try to name
PEMDAS is contemporary convention, but convention has been different at different times and in different areas, among other things. But this one isn't ambiguous at all. Every order of operations I've ever seen would produce the same result.
But ummm Addition comes before subtraction in PEMDAS so basically you are wrong! /s
I think the issue people have with PEMDAS is less that it's ambiguous and more that the viral "math problems" people fight over use stuff like the ➗ sign which would never be used in a real math problem. Also PEMDAS is basically never used past like 5th or 6th grade because there are much clearer ways of notating math
I’ve seen this claim a lot, but I recall seeing that division symbol in real math problems all through my school career. It’s not on my phone’s keyboard, but I absolutely saw it in school, both in books and on the board.
Just out of curiosity what kind of math classes did you take in school because once you get to algebra you should not be seeing the division symbol, everything should be expressed in fractions.
Yeah, no expression is ambiguous, that's a feature of the writing system. Any well-formed expression involving numbers and `+ - × / ^ ( )` can be parsed to a single number (or be undefined if division by zero occurs), for instance enter the expression in a Python shell (replace `^` by `**` though). Some expressions might *look* ambiguous, especially those involving the ÷ or / sign which nobody uses past middle school (except when writing inline equations online or in a programming language), when you use actual fraction bars all problems go away.
But you have to know the writing system's syntax. There are expressions that there are legitimate differences in how they should be applied. (But non in OP's expression). The big one is if implied multiplication, aka multiplication by juxtaposition takes precedence over explicit multiplication.
The only beef I have is everyone calling it PEDMAS and not BEDMAS you fuckers saying "parenthesis a + b paranthesis" instead of "bracket a + b bracket"?!?!
It’s a US thing. Brackets are typically only square brackets here,; the curved ones are called parentheses because they set aside a parenthetical in writing.
Yes, obviously. A bracket is a different thing: []. Least dumb e*ropean over here 🤮🤮🤮🤮
- parentheses: `()` - brackets: `[]` - braces: `{}`
>parentheses: () > >brackets: \[\] > >braces: {} This is true in en-US. They're "(circle) brackets", "square brackets" and "curly brackets" in en-GB.
I'm often on team "it's ambiguous," but this one is absolutely clear.
Eh, it could be written better
Really? Enter this in a TI-85 calculator: `6/2(1+2)` Then enter that in a HP calculator. Now tell me if the calculators gave the same answer. Some calculators give implicit multiplication higher precedence. And this is fine as long as it is documented and indeed all scientific calculators document their precedence rules.
not only is he wrong, but he is wrong by his own logic. That’s gotta be extra points right?
he walked right into the answer and still managed to miss it
It's so fucking wild to me that people can't calculate such simple math problems. And then others just parrot that these problems are made ambiguous on purpose. Like no, nothing here is ambiguous. It's a simple calculation that 8 year olds should be able to solve
This one isn’t (as it’s written here). The ones that go viral are.
Sure, but it's also the sort of thing that adults don't normally ever have to do, so it's not surprising the school kids do it more reliably. All of these posts are just ragebait generating engagement for social media attention farms.
This is so legit because I am a current high schooler. I have to do these types of problems in precalculus all the time
I’m doing a PhD in astrophysics and I struggle with this shit lmao. Granted I don’t have to do a lot of maths on paper anymore, so I just always check on a calculator on the small number of times I do have to… Maths is hard!
It's simple addition and subtraction. No adult should struggle with that, no matter how rarely they have to do this. Unless they have legitimate brain damage
I'm not talking addition/subtraction, I'm talking about the whole thing. PEMDAS gotcha posts are a plague on boomer social media because most people live lives free of any math more complex than basic single step calculations.
Actually With PEMDAS from what i was told is that if there is only addition/subtraction left you work left to right. So OP you are correct. PEMDAS is saying Parentheses, Exponents, Multiplication and/or Division, Addition and/or subtraction. Work left to right. Edit: Forgot to put in the and/or
Left to right is a convention but it isn't actually a rule, you can freely rearrange the terms in whatever order you'd like. That's a huge part of math. The "left to right" argument comes from things like a/b(c) where you have an ambiguous notation and you need to guess what the author meant by hoping they follow the same writing conventions they would in English.
You can’t freely rearrange division or subtraction unless you first convert them to fractions and negatives. 2 - 3 =/= 3 - 2 5 / 6 =/= 6 / 5 However, 2 + -3 = -3 + 2, and 5 \* (1/6) = (1/6) \* 5.
Unfortunately, this math makes sense if I take some old math classes literally. When I was taught order of operations, I was taught PEMDAS. With this you have to do ALL of one operator before moving to the next. Problem: 50 + 50 - 25 x 0 + 2 + 2 So, first you do all Parentheses. So, from their post, we can skip. Then, you do all Exponents. So, skip in this problem. Then, Multiplication. 50 + 50 - 0 + 2 + 2 We can skip Division as it is not present. Then, you do all Addition. 100 - 4 Finally, you do all Subtraction. 96 I know this is wrong (and most people do), but I see where this could easily happen when taking some lessons literally.
Brackets Orders Division/Multiplication Addition/Sbtraction. they are on the same level so thus are evaluated left to right.
I saw people using the term BODMAS and was confused as to what the letters each stood for (I learned it as PEMDAS), so thank you for teaching me about BODMAS.
I was taught GEMA: Grouping Exponents Multiplication Addition With the assumption being that division is just a type of multiplication and subtraction is just a type of addition. Division and subtraction aren't part of the acronym because they aren't actually a unique process.
That's a good way of thinking about it.
It helps that when I was learning it (second grade) the teacher drew a little "GEMA monster" to help remember it. Nowadays, I am old enough to realize that the monster was actually just the yeti from SkiFree.
_sigh_ I wanna play SkiFree now.
2nd grade?? Damn, we didn't even do multiplication tables until 3rd. Pemdas was in 6th or 7th.
I was part of an accelerated math program where I did math class with the 3rd graders.
Good on you. 3rd graders in my city are still learning how to count by blocks of tens and 100s. I wish public schools here would/could teach science and math topics at a faster pace. Growing up, my friends family homeschooled and I was learning the same topics as his brother 2 years younger than us.
Where teaches this magical acronym? It always facinates me what other places use to describe the order of opporations.
My teacher taught: "We use BEDMAS, but you'll also see PEMDAS, PODMAS, BOMDAS, etc. They all mean the same thing"
Don't worry - We also have BIDMAS here in the UK - where instead of Order (and from one teacher who didn't want to explain what order meant pOwer which is interesting) we used indecies to represent exponents. Basically maths is confusing.
Merry BODMAS.
Addition happens first if the additional function comes first. It's not that you do all the multiplication, then all the division, the all the additional, then all the subtraction. You do the multiplication and division steps in the same process but in order. And similarly you do the addition and subtraction in one process with whatever symbols come first. And easier way to think of it, id you really want to do addition first, is to stop thinking of it as subtraction. Think of it as adding negative numbers. So if it's 50+50-0+4+4, it'd be 50+50+(-0)+4+4. Then you can do all the additional at once and you don't mess things up. Hope this helped some people cuz it seemed to help others in college that didn't pick it up in jr/Sr high.
I'd find this way more amusing if I wasn't shit at math and couldn't give you the right answer if you held a gun to my head.
He says “addition comes first” which makes me think that he is reading PEMDAS as one long list. Like P then E then M then D then A then S. It’s surprisingly common for people to make this mistake. PEMDAS should really be read like PE(MD)(AS). Because multiplication and division are in the same “tier” of importance, they are done from left to right instead of M first then D. Same with AS. I assume most people here know that, but if you ever see someone making this same mistake in the wild that could be the explanation.
You’d just confuse people with the parentheses. I get what you’re saying, but never underestimate the power of an ignorant person. You can idiotproof all you want, but the world will just make better idiots.
Okay, I just want to be honest and say that I am *appalling* at math and I *did* have to read this through a couple of times. But it clicked even for me and even I’m just like “bruh… no.”
I think he saw +-×÷ and took it too seriously
I love that you censored your own name with "me" lol
Usually it's their order of operations that is how they get the wrong answer. But somehow going from 100-0+4 to 100-4 is on a whole other level of stupidity.
I think I see the mistake they are making. If there is just a - next to a +, it becomes negative. Or in some cases at least. So they are forgetting 0 is a number here. I think they are looking at it like after the multiplication it becomes 100- (+4). Mistaken that the 0 is there and is what the - is attached to. Or maybe I am giving them too much credit. That is always possible on the internet.
According to them (they responded after I posted this) they typically read right to left in their country and that's where the mistake came from. Idk how that leads to how they did this problem though.
Yeah that shouldn't make a difference. That is one of the reasons we standardize how math is done. Sounds like an excuse. Again, I think they just forgot the 0 was a real number attached to the - as that would give the answer they got. Makes the most sense.
I thought it was because if you treat plus to minus like multiplication to plus (kind of how PEMDAS) implies, you would get for example a+b+c-d+e=(a+b+c)-(d+e). Also if multiplication binds stronger why is 1/2×3≠1/6 as ultiplication is stronger. That is just my basic inerpretation of what PEMDAS would say. I gues it's supposed to mean P>E>M,D>A,S. Still find it weird. Just say PEMA and introduce the concept of subtraction and division just as forms of addition and multiplication. Or don't use a acronym at all. I'm glad anyways not to have had it learn this way.
They left out the negative when multiplying -25 with 0, and gave the negative to 4
There is none of those things in this equation lmao the P in PEMDAS is for parentheses. 25x0 is zero. So now it’s just 50+50=100. 100-0= 100. 100+4=104.
I was taught BEDMAS , never heard of PEMDAS until now
At least with this guy you can see where they got it from. PEMDAS ends with Addition AND Subtraction happening from left to right in the equation, but if you read left to right like they probably did you would do the same. So often I see someone do addition/subtraction before multiplication/division. But yeah no this dude should pay attention when the teacher says A&S happen together
thing is, he said "addition happens first" and then does multiplication first, he does 99% of it correctly and then thinks -0+4 is -4 how can someone be so close to being right and then just be completely wrong, it almost feels like trolling
Please excuse my dear Aunt Sally
This is a good version of it, but I am really sick of seeing PEMDAS... it's one niche bit of arithmetic and it feels like it's about 50% of the posts here
“addition happens first” They know that subtraction is just adding negative numbers right?
That’s the problem with teaching acronyms. They can be misinterpreted/misunderstood or misremembered. Why do we keep teaching children silly little tricks instead of the logic behind it. Why don’t we teach, but make them memorise? I am sure there is a great reason for why we continue it, but I just can’t see it.
God, I hate the "Addition comes first!" crowd. They really think that because PEMDAS lists addition before subtraction, that means that addition must always come before subtraction. I had this argument with my mom about it and she refused to believe it goes left to right even after I looked it up online and confirmed it.
just say: PEMDAS BODMAS They both have differences in division and multiplication, why is that? Because you're supposed to evaluate from left to right, doesn't matter between Addition and Subtraction nor Multiplication or Division, since they have the same order as eachother.
It's clearly 5
This is the most tiresome sort of 'gotcha' shit.
First time I saw someone fail on the left to right aspect and not the operation order itself.
The math isn't mathing.
“Addition happens first” lol
People stop not knowing order of operations challenge (impossible)
Sorry, I meant “addition happens first” lol. I was reacting to what he said. I should’ve made that more clear, sorry
Ah, thank you for clarifying. I was fully ready to accept that there was yet another person commenting the wrong answer/method under a confidentlyincorrect post
Saw a great video the other day about why PEMDAS is bad and should be PEJMDAS instead. Because what usually screws people up is not doing implied juxtapositions which take priority over multiplication and division left to right.
order of operations was invented by mathematicians who were yoo lazy to draw parenthesis everywhere.
I can't blame them, math gets time consuming when you write everything out
I would think performing operations sequentially left to right or right to left is more intuitive but it doesn't really matter too much.
Google told me it's 104. So I'm going to side with Google since it's probably better at math than I am.
There is no such rule as addition comes first. There is no difference between 10 + 2 - 1 and 10 - 1 + 2. Both gives the same result. Which is obviously 11. Also the guy treated the part of the equation as if there were brackets. Maybe he'd understand a middle school math one day. Also what middle school? It's **elementary school math**. Especially that he can't even add or subtract. Both multiplications and divisions are elementary school math. So are brackets.
Ah yes the old 100 minus 0 plus 4 equals 96 proof. It has stumped our greatest mathematicians for years /s
I don't even understand what he means.
It’s a result of the PEMDAS mnemonic. Addition and subtraction happen at the same precedence, but the A precedes S in PEMDAS, which makes the incorrecter think addition has precedence. So they interpret the expression as `(50+50)-((0x25)+2+2)`, which would result in 96.
I wonder if these people get their math knowledge from Tiktok. I know 8 year olds who know how to add and subtract in the right order.
Apparently he thinks addition happens before subtraction. So he thinks 50+50-25×0+2+2=(50+50)-(25×0+2+2)
I just want to know. Why do Americans suck at math? I've lived there over a decade and still can't figure it out. Please someone explain to me
Haha actually the person sucking at math in this post is the non-american. The other person is not American and I am.
😂 they’re so stupidddd
I'm dutch and I'm not sure if this has happened in other countries aswell. My parent were taught to do: Power > multiplication > division > root > addition > subtraction I was taught to do: Power + root > multiplication + division > addition + subtraction. Operators on the same level are done left to right. Looking at the dutch wikipedia page (can't find from scanning the English one) this order really has changed in the last couple decades. So people who het this wrong are just old and not up to date. Don't hate on them, educate them.
It didn’t change, it’s been clarified. Because the older generation don’t pay more than passing attention.
They are wrong on 2 fronts. Their answer to the problem, and using the term "maths".
Most non-americans call it maths, short for mathematics
I'm aware, it was sarcasm. My fault for not being more obvious.
I don't know if at this point I can really go with the education system having fail us, or that people are so FUCKING STUPID that they can't learn shit no matter how long they have been taught about it.
PEMDAS was a mistake