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.
Comment on I dunno
SSUPII@sopuli.xyz 11 months ago
I feel like I am getting trolled
Isn’t 17 the actual right answer?
marcos@lemmy.world 11 months ago
MotoAsh@piefed.social 11 months ago
Hopefully you can see where their confusion might come from, though. PEMDAS is more P-E-MD-AS. If you have a bunch of unparenthesized addition and subtraction, left to right is correct. A lot of like, firstgrader math problems are just basic problems that are usually left to right (but should have some extras to highlight PEMDAS somewhere I’d hope).
So they’re mostly telling you they only remember as much math as a small child that flunked.
SpaceCadet@feddit.nl 11 months ago
If you have a bunch of unparenthesized addition and subtraction, left to right is correct
If you have a bunch of unparenthesized addition and subtraction, left to right doesn’t matter.
1 + 2 - 3 = 1 - 3 + 2 = -3 + 2 + 1
MotoAsh@piefed.social 11 months ago
True, but as with many things, something has to be the rule for processing it. For many teachers as I’ve heard, order of appearance is ‘the rule’ when commutative properties apply. … at least until algebra demands simplification, but that’s a different topic.
kuberoot@discuss.tchncs.de 11 months ago
If you have a bunch of unparenthesized addition and subtraction, left to right doesn’t matter.
Right, because 1-2-3=3-2-1.
Feathercrown@lemmy.world 11 months ago
PE(MD)(AS)
Now just remember to account for those parentheses first…
SmartmanApps@programming.dev 10 months ago
PE(MD)(AS) Now just remember to account for those parentheses first
Those Brackets don’t matter. I don’t know why people insist it does
orbitz@lemmy.ca 11 months ago
Huh I just remembered the orders of arithmetic but parentheses trump all so do them first (I use them in even the calculator app). Mean I assume that’s that that says but never learned that acronym is all. Now figuring out categories of words;really does my noodle in sometimes. Cause some words can be either depending on context. Math when it’s written out has (mostly) the same answer. I say mostly because somewhere in the back of my brain there are some scenarios where something more complicated than straight arithmetic can come out oddly but written as such should come out the same.
SmartmanApps@programming.dev 10 months ago
addition and subtraction, left to right is correct
You can do addition and subtraction in any order and it’s still correct
SkyeStarfall@lemmy.blahaj.zone 11 months ago
I mean, arithmetic order is just convention, not a mathematical truth. But that convention works in the way we know, yes, because that’s what’s… well… convention
SmartmanApps@programming.dev 10 months ago
I mean, arithmetic order is just convention
Nope, rules arising from the definition of the operators in the first place.
not a mathematical truth
It most certainly is a mathematical truth!
But that convention works in the way we know, yes, because that’s what’s… well… convention
The mnemonics are conventions, the rules are rules
SkyeStarfall@lemmy.blahaj.zone 10 months ago
The rules are socially agreed upon. They are not a mathematical truth. There is nothing about the order of multiple different operators in the definition of the operators themselves. An operator is simply just a function or mapping, and you can order those however you like. All that matters is just what calculation it is that you’re after
marcos@lemmy.world 11 months ago
Social conventions are real, well defined things. Some mathematicians like to pretend they aren’t, while using a truckload of them; that’s a hypocritical opinion.
That’s not to say you can’t change them. But all of basic arithmetic is a social convention, you can redefine the numbers and operations any time you want too.
SmartmanApps@programming.dev 10 months ago
Social conventions are real, well defined things
So are the laws of nature, that Maths arises from
Some mathematicians like to pretend they aren’t, while using a truckload of them; that’s a hypocritical opinion
No, you making false accusations against Mathematicians is a strawman
That’s not to say you can’t change them
You can change the conventions, you cannot change the rules
But all of basic arithmetic is a social convention
Nope, law of nature. Even several animals know how to count.
you can redefine the numbers and operations any time you want too
And you end up back where you started, since you can’t change the laws of nature
Petter1@discuss.tchncs.de 10 months ago
Well, this is just a writing standard that is globally agreed on,
The writing rules are defined by humans not by natural force
(That one thing and another thing are two things, is a rule from nature, as comparison)mindbleach@sh.itjust.works 10 months ago
Save yourself the trouble - Smartman Apps is a crank. They categorically will not comprehend the difference between the notation we made up and how numbers work. Dingus keeps saying ‘animals can count’ like that proves parentheses-first is completely different! from distribution.
Why’d Russel and Whitehead bother with the Principia Mathematica when they could just point to Clever Hans?
SmartmanApps@programming.dev 10 months ago
this is just a writing standard that is globally agreed on
No, it’s a universal rule of Maths
The writing rules are defined by humans not by natural force
Maths is for describing natural forces, and is subject to those laws
That one thing and another thing are two things, is a rule from nature
Yep, there are even some animals who understand that, and all of Maths is based upon it.
SmartmanApps@programming.dev 10 months ago
Some people insist there’s no “correct” order for the basic arithmetic operations.
And those people are wrong
And worse, some people insist the correct order is parenthesis first, then left to right
As per Maths textbooks
Both of those sets of people are wrong
All Maths textbooks are wrong?? 😂
pixeltree@lemmy.blahaj.zone 11 months ago
[deleted]SSUPII@sopuli.xyz 11 months ago
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.
JackbyDev@programming.dev 11 months ago
They did the joke wrong. To do it right you need to use the ÷ symbol. Because people never use that after they learn fraction, people treat things like a + b ÷ c + d as
a + b ----- c + d
Or (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 - c
Is much more common and useful. Do people get used to grouping everything around the division operator as if they’re in parentheses.
CannonFodder@lemmy.world 11 months ago
Or
12 / 2(6) And trying to argue this is 36.SmartmanApps@programming.dev 10 months ago
Because people never use that after they learn fractions,
Yes they do, because not every division is a fraction
sukhmel@programming.dev 11 months ago
Treat
a + b/c + dasa + b/(c + d)I can almost understand, I was guilty of doing that in school with multiplication, but auto-parenthesising the first part is really crazy take, imo
Zephorah@discuss.online 11 months ago
Alternatively, the poster calculated the wrong answer, thus assuming this guy was wrong.
Ghyste@sh.itjust.works 11 months ago
Because OP posts garbage to all the meme communities.
DragonTypeWyvern@midwest.social 11 months ago
This shit take got deleted right in front of my eyes
The system works
SSUPII@sopuli.xyz 11 months ago
Oh so just like me on !lemmyshitpost@lemmy.world
pixeltree@lemmy.blahaj.zone 11 months ago
Gotcha gotcha, sorry
RizzRustbolt@lemmy.world 11 months ago
There is no answer. Because there is no question.
imetators@lemmy.dbzer0.com 11 months ago
That is a problem, tho
polydactyl@lemmy.world 11 months ago
I know the solution
SmartmanApps@programming.dev 10 months ago
Because there is no question
So Maths test says “2+3 ____”, and you write “that’s not a question” on the blank line?? 😂
NewDark@lemmings.world 11 months ago
Exactly
sem@lemmy.blahaj.zone 11 months ago
So it’s just an unfunny meme?
NewDark@lemmings.world 11 months ago
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.
namingthingsiseasy@programming.dev 11 months ago
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.
ExtremeDullard@piefed.social 11 months ago
As most memes are.
Ghyste@sh.itjust.works 11 months ago
Not even a meme.
Klear@quokk.au 10 months ago
It’s engagement bait.
0x0@lemmy.zip 11 months ago
More like a sad realization of the state of (un)education in some parts of the so-called civilized world.
You laugh not to cry.