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[-] Triasha@lemmy.world 77 points 9 months ago

Pemdas, parenthesis first, for a total of 3. Then multiplication, 15, then addition. 17. What's hard about this?

[-] Hawanja@lemmy.world 26 points 8 months ago

What's hard about it is people are fucking stupid.

[-] TheKingBee@lemmy.world 6 points 8 months ago* (last edited 8 months ago)

No, it's written poorly to drive engagement. People read left to right and try to do math that way too, but if you want to be mean to people who don't remember things they learned in elementary school then never applied in real life you write it like OP.

(8-5)5+2

Far easier for most people, but then you don't get the arguments...

[-] InternetCitizen2@lemmy.world 4 points 8 months ago

I studied physics a bit and order of operations was always clear. Not sure why people are down voting this.

[-] Tyro@lemmy.world 3 points 8 months ago

Yes, thank you! Sure, it'd be great if people remembered arithmetic rules, but just write it better and it won't matter.

[-] SmartmanApps@programming.dev 1 points 8 months ago

just write it better

It's written like that in Maths textbooks. i.e. there's nothing wrong with it.

[-] Hawanja@lemmy.world 2 points 8 months ago

It's written the same way literally thousands of math problems in thousands of textbooks have written the same type of math problem for the last 100 years. OP did not write it that way to be "mean." He wrote it that way because it's a legit way to write it.

[-] TheKingBee@lemmy.world 1 points 8 months ago

The operational order is fucked, the way I rewrote is more readable, even if you remember the order. The only reason you'd write the equation like that is to be mean, there's no reason to write it like that unless you're trying to trip people up.

[-] Hawanja@lemmy.world 2 points 8 months ago* (last edited 8 months ago)

You got it wrong on your first try, didn't you? Lol, it's not "mean" to write a math problem. The whole point of memorizing the order of operations is so that you can solve it no matter what order the equation is written in. No one wrote this problem on purpose just to make you fail to understand it, that's dumb.

[-] TheKingBee@lemmy.world 1 points 8 months ago

This was literally written for twitter content...

[-] Hawanja@lemmy.world 2 points 8 months ago

I just fail to see how you come to the conclusion that it was written in a "mean" way. It's math, there is no "nice" way to write an equation.

[-] TheKingBee@lemmy.world 1 points 8 months ago

it's mean in that they intentionally wrote it to trip people up so we'd have this very conversion...

[-] Hawanja@lemmy.world 2 points 8 months ago

But how do you know they did that? Becuase it's perfectly legit the way it's written.

[-] TheKingBee@lemmy.world 1 points 8 months ago

Because this it's trivial to write it in a way that won't cause this confusion and yet every 3 months or so someone posts another one of these gotcha no context given equations and we as the internet have this same discussion again and again. It's bait...

[-] Hawanja@lemmy.world 2 points 8 months ago

Well, it's causing YOU confusion yes. But to anyone who remembers the order of operation it's not confusing at all.

[-] TheKingBee@lemmy.world 0 points 8 months ago* (last edited 8 months ago)

Do you remember how this reply thread started? I literally fixed the equation so that it would be less confusing to people, I couldn't do that if I didn't know what order it was meant to go in...

I'm just not assuming that people are stupid because they got tripped up by something designed to trip them up.

It's writing like this with math, you can find the sentence structure, but it makes it a puzzle people will mess up unnecessarily It's writing like this with math.

[-] Hawanja@lemmy.world 2 points 8 months ago* (last edited 8 months ago)

But you didn't "Fix" the equation, because it wasn't "broken." You just rearranged it so that it made more sense to you, yourself, personally. It already made sense to other people who've learned the proper order of operations. Your metaphor fails here because unlike the signs you posted above, this equation is perfectly understandable in either form.

I'm sorry my friend, math is not "mean." You cannot use math to oppress people.

[-] TheKingBee@lemmy.world 1 points 8 months ago

Those sentence are also perfectly understandable, once you've understood the order of the words, but they're written in such away that you have to think about it.

If there are multiple ways to do things and one is more accessible to most people with less effort that isn't the objectively right way but it is better.

It's obviously not just myself as posting out of order math problems are a constant source of online engagement.

[-] Hawanja@lemmy.world 1 points 8 months ago* (last edited 8 months ago)

Those sentence are also perfectly understandable, once you’ve understood the order of the words, but they’re written in such away that you have to think about it.

No, they aren't. Read the way they're written, as in left to right, none of those sentances make sense. They do not make sense because they disobey the rules of grammar.

But the math equation 2+5(8-5)=17 makes perfect sense. Writing it like (8+5)5+2 =17 also makes perfect sense, but writing it this way does not somehow enable it to make "more" sense than the first way. It does not, because both of those equations are the exact same thing. It's called "the law of equivalence," i.e. 2+5=5+2. It's just two ways of writing the exact same thing. You cannot do this with grammar. "The Horse eats the grass" =/= "The grass eats the Horse." You cannot just rearrange the words in a sentance and get the same meaning the same way you can rearrange the elements in an equation.

It's not "less effort" to read it one way or the other, because both of those equations are exactly the same. It only makes "more" sense to YOU, yourself, personally. But to everyone else who learned the order of operations it makes no difference which way it's written.

It’s obviously not just myself as posting out of order math problems are a constant source of online engagement.

Like I said in the begining, people are fucking stupid.

[-] TheKingBee@lemmy.world 1 points 8 months ago* (last edited 8 months ago)

People are stupid, any system that fails to take that into account and mitigate it is doomed to frustration and failure...

writing it this way does not somehow enable it to make “more” sense than the first way

it does because people read (and therefore do math) left to right. it makes more sense because it accounts for the fact that most people know how to read, but don't know the operational order of math equations.

We're just going in circles, so let's just agree to disagree.

[-] Hawanja@lemmy.world 1 points 8 months ago* (last edited 8 months ago)

People are stupid, any system that fails to take that into account and mitigate it is doomed to frustration and failure…

I hope you're not implying that arithmetic has somehow "failed" the human race or something.

it does because people read (and therefore do math) left to right.

No, it only makes more sense this way to YOU, yourself, personally. To everyone else who knows the order of operations it makes perfect sense either way. You're projecting your own limitations on everybody else. Other people have learned the proper way to do equations.

[-] SmartmanApps@programming.dev 1 points 8 months ago

Writing it like (8+5)5+2 =17 also makes perfect sense

Actually that's invalid syntax. Imagine if it was (8-5)-5 and you see why.

[-] SmartmanApps@programming.dev 1 points 8 months ago

posting out of order math problems

There's no such thing, only people who remember the rules of Maths and people who don't

[-] SmartmanApps@programming.dev 1 points 8 months ago

I literally fixed the equation so that it would be less confusing to people

No you didn't. You wrote something that is mathematically invalid.

[-] SmartmanApps@programming.dev 1 points 8 months ago

Because this it’s trivial to write it in a way that won’t cause this confusion

Which is exactly how it is written, for all those who remember the rules of Maths.

[-] SmartmanApps@programming.dev 1 points 8 months ago

it’s mean in that they intentionally wrote it to

Test who remembers the rules of Maths

[-] SmartmanApps@programming.dev 1 points 8 months ago

The operational order is fucked

No it isn't.

the way I rewrote is

Wrong.

The only reason you’d write the equation like that is

Because it's written like that in Maths textbooks

there’s no reason to write it like that unless you’re

Obeying the rules of Maths, as found in Maths textbooks

[-] SmartmanApps@programming.dev 1 points 8 months ago

No, it’s written poorly

No it isn't

drive engagement

The engagement comes from people not remembering the rules of Maths

(8-5)5

That's an invalid syntax. it's 5(8-5) or 5x(8-5), nothing else. Why is it invalid? Imagine (8-5)-5 - am I multiplying what's in the brackets by -5 (which gives -15), or subtracting 5 after doing the brackets (which gives -2)? Invalid syntax

Far easier for most people

Nope, it's wrong for everyone, due to being an invalid syntax.

[-] baines@lemmy.cafe 26 points 8 months ago

you go the other direction below the equator

[-] Bakkoda@lemmy.world 14 points 8 months ago

Legit gave me pause for like half a second. Damnit lol

[-] TonyTonyChopper@mander.xyz 5 points 8 months ago

Isn't the southern hemisphere above the equator if you live there

[-] baines@lemmy.cafe 4 points 8 months ago

depends if you are normal or planar in ENU coordinates

[-] AquaTofana@lemmy.world 10 points 8 months ago

I fucking suck at math and totally just re-proved it to myself with this problem lmao.

It didn't make sense to me to multiply the 3 & the 5 with zero consideration for the "2". I have ALWAYS struggled with the steps to solve these types of equations.

So the answer I got was 21. Some of us are just bad with numbers, I s'pose.

[-] borari@lemmy.dbzer0.com 13 points 8 months ago

The numbers in the equation and their totals are completely irrelevant to the order you perform the operations.

I don’t think it’s an issue of “being bad with numbers”, I think the issue is not understanding the logic or being able to understand the bottom up type of thinking or something.

[-] mfed1122@discuss.tchncs.de 6 points 8 months ago

This is absolutely not a problem of being bad with numbers. That's like if I had trouble reading a Chinese sentence about gardening and said I'm just bad with plants. My issue is that I'm not familiar with the notation used to explain the concept - not a problem with the concept itself that the notation merely arbitrarily symbolizes.

Being good or bad at math is not really an inherent thing, aside from some geniuses and some people with disabilities. If you want to be good at math, you can be!

[-] Triasha@lemmy.world 2 points 8 months ago

If you don't remember pemdas, you can use the longer P.lease E.xcuse M.y D.ear A.unt S.ally.

[-] Rcklsabndn@sh.itjust.works 2 points 8 months ago

That's the answer I arrived at as well, don't feel so bad. I'm more of a writer than a calculator, though.

[-] SmartmanApps@programming.dev 1 points 8 months ago

It didn’t make sense to me to multiply the 3 & the 5 with zero consideration for the “2”

That's what the order of operations rules say to do. 2 doesn't come into it until you get down to the Addition step.

[-] SmartmanApps@programming.dev 1 points 8 months ago

Pemdas, parenthesis first, for a total of 3

Nope, a total of 15.

Then multiplication

There isn't any Multiplication, only Addition and Brackets (and Subtraction inside Brackets).

[-] Triasha@lemmy.world 1 points 8 months ago

And what do you do with the number inside the when you want to get rid of it?

[-] SmartmanApps@programming.dev 2 points 8 months ago

And what do you do with the number inside the when you want to get rid of it?

You literally must distribute the coefficient before you can do anything with what is inside to remove Brackets, as per The Distributive Law, a(b+c)=(ab+ac), now you can work on getting rid of what is inside.

[-] Triasha@lemmy.world 1 points 8 months ago

And what do you do with and and the b and then the a and the c? If you want to simplify the equation?

[-] SmartmanApps@programming.dev 1 points 8 months ago

And what do you do with and and the b and then the a and the c? If you want to simplify the equation?

Add them, obviously 🙄

[-] Triasha@lemmy.world 2 points 8 months ago
[-] SmartmanApps@programming.dev 1 points 8 months ago

And what do you do with and and the b and then the a and the c?

BTW, there's no "the a and the b" and "the a and the c", there's ab and ac, which need to be added. If a=2, b=3, and c=4, we have 2(3+4)=(6+8)=14

this post was submitted on 27 Nov 2025
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