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I got some people really angry at me when I suggested writing some math expression with parenthesis so it would be clearer. I think someone told me that order of operations is like a natural law and not a convention, and thus everyone should know it or be able to figure it out.
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This is an antimeme
2 5 8 5 - × + for you RPN fans =)
To all the people yelling PEMDAS and BOMBDAS or whatever - languages other than English exist.
KlaHoPS
KlaPuStri
IT’S PEMBDURRS
Klammer, Punkt, Strich?
PEMDAS is fucking bullshit
You don’t teach by nailing down strict, unflexible rules with no logic behind them
Hrmm.
I read that as resulting in 21.
My education system did fail me.
I plugged that into ghci as 5+2*(8-5), and it says 17.
:(
I did (5+2)*(8-5).
Doh.
You do parenthesis first and then multiplications and then sums, you did parenthesis, then sums, then multiplications, wich is wrong.
plugged that into ghci as 5+2*(8-5), and it says 17.
You might want to report that error. Or, did you mean 2+5*(8-5)?
I’m not seeing a single mention of My Dear Aunt Sally. The youth are lost…
Aunt Sally said some racist things at Thanksgiving, I’m tired of excusing her smh
Already saying racist things this early in the morning? (It’s Thanksgiving in the US today)
I’ll never understand these approaches to learning. They require remembering the phrase, and then require remembering how the phrase translates to the rules you need to remember.
I’ll just remember the rules in the first place. Less effort.
There’s just no way rote learning is easier than mnemonics unless you have a photographic memory.
Shit, I still remember the order of taxonomic ranks after seeing the phrase “King Phillip came over from Germany stoned” written in a used bio textbook 30 years ago when we never even made it to that chapter to officially study in class. I guarantee I never would’ve remembered the list “kingdom phylum class order family genus species”.
Was anyone else ever taught it as BOMDAS as opposed to BODMAS?
There’s no difference.
Addition and subtraction are the same operation, multiplication and division are the same operation.
So:
BO(MD)(AS) == BO(DM)(AS)
EDIT: in order to stop confusing people, it should just be: BOMA.
PEMDAS, is that the same as BOMDAS?
Why do people put bot pairs of multiplication and division, and addition and subtraction on the acronym?
Do you really follow that order with the associative operations?
do you think i know what an associative operation is?
I think so. Amazing how many different ways there are to say it
So instead of Parentheses, Exponents is it Box and O that digit in the sky?
It was BEDMAS for us, where the E was exponents or something.
Yeah, I was taught BOMDAS here in Australia.
I was taught BODMAS in Australia
Its BODMAS for maths and BOMDAS for twerking.
Easy mistake to make given the amount of maths involved in dancing.
I feel like I am getting trolled
Isn’t 17 the actual right answer?
Some people insist there’s no “correct” order for the basic arithmetic operations. And worse, some people insist the correct order is parenthesis first, then left to right.
Both of those sets of people are wrong.
Exactly
So it’s just an unfunny meme?
I think it’s meant to play with your expectations. Normally someone’s take being posted is to show them being confidently stupid, otherwise it isn’t as interesting and doesn’t go viral.However, because we’re primed to view it from that lens, we feel crazy to think we’re doing the math correctly and getting the “wrong answer” from what we assume is the “confident dipshit”.
There’s layers beyond the superficial.
I fell for it. It’s crazy to think how heavily I’ve been trained to believe everything I see is wrong in the most embarrassing and laughable way possible. That’s pretty depressing if you think about it.
As most memes are.
Not even a meme.
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Yeah I know that. But I was feeling confused as to why it was here. That’s why I was feeling trolled, because it made me doubt basic math for being posted in a memes community.
Gotcha gotcha, sorry
Alternatively, the poster calculated the wrong answer, thus assuming this guy was wrong.
They did the joke wrong. To do it right you need to use the ÷ symbol. Because people never use that after they learn fractions, people treat things like a + b ÷ c + d as
a + b ----- c + dOr (a + b) ÷ (c + d) when they should be treating it as a + (b ÷ c) + d.
That’s the most common one of these “troll.math” tricks. Because notating as
a + b + d - cIs much more common and useful. So people get used to grouping everything around the division operator as if they’re in parentheses.
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This shit take got deleted right in front of my eyes
The system works
Oh so just like me on !lemmyshitpost@lemmy.world
There is no answer. Because there is no question.
That is a problem, tho
I know the solution
are you THAT lazy
Fuck everyone else I thought this was funny
Me too! I had only scorn for the initial comment, but this response was perfect
asks ai if using ai is good
ai says using ai is goodwhat a fucking surprise
Computer please tell me I’m right
So you’re the guy that asked chat GPT if you could enter Chile without a passport, said yes, come to Chile and had to go back because you actually needed a passport huh?.
It surprises me the amount of people who just “outsource” their intelligence to a fking chatbot and then proceed their way in life taking moronic decisions all over, a reminder AI companies depend on people being too lazy to think to be able to sell their products.
Coal rolling, but for IT-literate.
Funny, tell that to the billionaires who have a private jet.
are you dumb?
I may very well be, still researching.
kek
Presuming PEMDAS is our order of operations and the 5 next to the parentheses indicates multiplication…
2+5(8-5) -> 2+5(3) -> 2+15=17
Other than adding a multiplication indicator next to the left parentheses for clarification (I believe it’s * for programming and text chat purposes, a miniature “x” or dot for pen and paper/traditional calculators), this seems fine, yeah.
…I worry about how many people may not understand how to solve equations like these.
Multiplication sign is not required in situations like this. Same with unknowns - you don’t have to write
2*x, you just write2x.That’s not even an equation, just basic algebra
Technically not algebra, right? Algebra is where you move things around and solve for variables, and that kind of thing. This is just arithmetic.
Fair enough, I’ve heard “math problem” and “math equation” used interchangeably.
Also you would be surprised how many people do not know basic algebra, at least in the US rofl
You. You are one of them bc you do not know what an equation is.
There is no algebra here. This is arithmetic.
Algebra has horrible syntax. Way too much implications.
While I never failed a math class, I also never went past high school. When would your presumptions NOT be true?
Some forms of programming syntax, although there are the fringe cases where an equation (or function in programming) is represented by a symbol in conjunction with a parentheses input.
For example:
y(x) = 2*x+3
5+y(1) = 10, as 1 is substituted in for x in the prior equation.
And in some languages a number can be used as a name of a variable or a function, so it can be anything really
I prefer BM-DAS, no one’s out here doing exponents, and no one calls brackets “parentheses”…
The way I was taught growing up, brackets are [these]. Parenthesis are (these).
Yes, technically the latter are also brackets. But they can also be called parenthesis, whereas the former is exclusively a bracket. So we were taught to call them separate words to differentiate while doing equations.
I’m a theoretical physics grad student and a night school maths teacher, I have never heard this distinction. People in academia around me call them round and square brackets.
It’s a US vs UK (and probably others) distinction. The ( ) are almost never called brackets in the US, unless it’s a regional thing I’m not aware of. Also the [ ] didn’t get used in any math classes I was in the US up through calculus except for matrices.
Interesting! Nobody at my institute is a native English speaker. They’re from several European and some Asian and south American countries.
Yeah, but as an adult it depends entirely on whether you’re in an industry or hobby that requires that level of bracket nuance/exponents.
Most of us are just trying to remember the basics.
I learnt it as BODMAS (brackets, orders, division and multiplication, addition and subtraction).
Edit: I see we’re repeating points from the earlier posts down there 👇 (with default sort).
5 isn’t a valid function name, is obviously the right answer.
I’m pretty sure that’s a module operator…
It could be a Church Numeral
How can you be sure it’s not defined when we only see one line?
They didn’t say it’s not defined, they said it’s not a valid name. Most languages don’t allow function names to start with a number, so 5 literally cannot be a function if that’s the case.
But that’s assuming this isn’t some really obscure language.
PEMDAS bitches.
Please Excuse My Dear Aunt Sally… bitches.
It’s interesting that you can somewhat tell where you are from based on this, I learned it as BODMAS
I learned BODMAS too! It seems BIDMAS is another one (British I think), PEMDAS is the weird American one, BEDMAS is a thing too. You’re able to vary the first letter (parenthesis or brackets), second letter (indices/exponent/“order” or “operation”), and the order of multiplication/division (MS or SM) and addition/SUBTRACTION (AD or DA)
Very interesting indeed.
We need a super position of all of them.
O - oxponent?
Orders.
Brackets, Orders (powers and roots), Division, Multiplication, Addition, and Subtraction
Division, Multiplication, Addition, and Subtraction
This is fucking so many people over… It should be limited - like Orders - to only Multiplication and Addition.
Because division is the same operation as multiplication, and subtraction is the same operation as addition, and they have the same “weight” in the order of operations (meaning, you do them left-to-right).
Another commenter mentioned something similar, how they’re interchangeable, but I’m not sure why you say it’s fucking people over.
Where are pemdas and bodmas users from?
It talks about it here:
Pemdas, USA. Bodmas, UK.
I think most former British colonies use BODMAS
But the USA seems to use PEMDAS? I’m confused now…
They mean Commonwealth countries more precisely
Yeah, my bad
BEDMAS, Canada
I never ran into PEMDAS while growing up, in Sweden I’ve always been taught of it as the following order of operations:
- P
- E & Roots
- M & D
- A & S
That’s PEMDAS…
Technically roots are a form of exponent, just fractional (square root is power of 1/2, for instance). I can see how it could be easier to conceptualize when you break it down like that though. Neat to see the differences compared to the US breakdown :)
Technically we go for 2. Powers & Roots, I just didn’t want to break the PEMDAS when comparing. :)
Syntax error
Obviously the answer is 2+x(y)
And even if you don’t simplify it to y the end result is the same
2+x(y-z) = 2+xy-xzI don’t know why, but this was intuitively my first approach. Eve though it’s much simpler than that.
The education system did not fail me. I failed my education.
