this post was submitted on 19 Jun 2025
817 points (97.1% liked)
Math Memes
2601 readers
1 users here now
Memes related to mathematics.
Rules:
1: Memes must be related to mathematics in some way.
2: No bigotry of any kind.
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Natively? It's a math equation there is only one way to read it as far as I am aware.
Hear hear
Reread
Naively, not natively. Someone who wasn't a good math student, or just doesn't remember, might read it left to right and come to the wrong conclusion. The rules for order-of-operations are, so far as I know, arbitrary, and different people coming at it without instruction (ie: naively) could arrive at different conclusions. Knowing that you're supposed to do division first isn't obvious.
You could read
25 - 5 ÷ 5as "25 - 5 is 20. 20 divided by 5 is 4" or you could read it (correct, per the standard rules) as "25 minus.. hold on.. 5 divided by 5 is one. Now 25 subtract that from the 25 sitting over there, and get 24." This isn't the same kind of error as, like, "5 divided by 5 is 0"You could. You could also lower your pants and drop a massive turd and call that the answer. Both answers would be equally wrong.
PEMDAS isn't a suggestion that you follow when it suits you, like religion. It's how math is communicated, unambiguously.
In any case, if that's where we lost you, then I've calculated the chance of you catching the factorial as √-1.
You're being weirdly aggressive, but okay.
Most people know the symbols for addition subtraction multiplication and division. Far fewer people know the established order of operations. That's what powers those "only 3% of people solve this problem correctly!" math memes.
But okay. Communicate badly (ie: by failing to acknowledge your audience's context) and be smug if you want.
You do realize your "You're communicating badly" attitude is the only smugness happening here, right?
Oh you're gonna love my other reply then.
Don't expect me to pander to willful ignorance. If you're going to act like an idiot, expect to be treated like one.
Also, what's with the passive aggressiveness? I understand that my confrontational approach there can make some people uncomfortable, but it's my prerogative.
On the extremely rare occasion when I have the misfortune to be performing a mathematical calculation, I take enormous pleasure in carrying out the operations exclusively left to right unless indicated otherwise by brackets, which is the correct way to indicate this. If you want me to do a calculation separately, put brackets around it or bugger off. It’s your choice, really
Many of the things we believe about ourselves and our experiences turn out to be false. Sometimes this is due to innocent memory failures or to the lack of needed information.
Suppose that Charles believes that he failed his biology test because the professor asked obscure and ambiguous questions.
Charles believes this because he doesn’t realize that he got the lowest score out of the 100 students who took the test, and that most people did quite well.
If Charles had this information, he would realize that he failed the test because he didn’t study hard enough, or because he’s not very good at biology.
On the other hand, if Charles continues to believe that the test was unfair after seeing the grade distribution, he is either severely challenged in his capacity for rational calculation or he is the perpetrator of willful ignorance.
Which is it?
I literally just said I enjoy doing calculations incorrectly because I dislike the method of notation so much that I reliably and deliberately choose to misinterpret it every time.