You have to subtract the numbers with the most flat sides first and divide by the number of pennies in your sock drawer.
I dunno
Submitted 2 weeks ago by LadyButterfly@piefed.blahaj.zone to science_memes@mander.xyz
https://piefed.cdn.blahaj.zone/posts/Ao/vN/AovNhRmmeHwHDFK.jpg
Comments
Daft_ish@lemmy.dbzer0.com 2 weeks ago
Saapas@piefed.zip 2 weeks ago
Something funny about everyone being so eager to show how they can solve this
pewgar_seemsimandroid@lemmy.blahaj.zone 2 weeks ago
the answer is [Answer]
mindbleach@sh.itjust.works 2 weeks ago
Careful, you’ll summon Smartman Apps (with emojis) to insist mathematics has exactly one perfect unambiguous syntax, where 2*(1+3) is somehow different from 2(1+3), and also reverse Polish notation does-too have parentheses.
SmartmanApps@programming.dev 3 days ago
insist mathematics has exactly one perfect unambiguous syntax,
It sure does! 😂
2*(1+3) is somehow different from 2(1+3)
Yep, one is Multiplication - 2x3 - the other is The Distributive Law - (2x1+2x3) - both easily found in Maths textbooks
Kolanaki@pawb.social 2 weeks ago
2+5 is 8, 8-5 is 3. 8×3 is 24.
SmartmanApps@programming.dev 3 days ago
2+5 is 8
In which you just did Addition before Brackets, and is thus wrong
8-5 is 3
5(8-5) is 15
8×3
There is no 8x3. 2+5(8-5)=2+15=17
poke@sh.itjust.works 2 weeks ago
2+5=8 quick maths (please don’t fix it, thanks. Hope you’re having a good one)
PhAzE@lemmy.ca 2 weeks ago
BEDMAS
do it in the order of brackets, exponents, division, multiplication, addition, and subtraction.
Kolanaki@pawb.social 2 weeks ago
So, brackets: (8-3) is 5, Multiplication: 5×5 is 25, addition: 25+2 is 27? 🤔
x4740N@lemmy.world 2 weeks ago
Its because its
2+5×(8−5)
My calculator app automatically added it when typing in what was I’m the image and “2+5×(8−5)” does equal 17
It’s absolutely the fault of the person making the social media media post for not writing it properly and confusing people
odelik@lemmy.today 2 weeks ago
The multiplication is implied and has been part of the standard mathematical notation for far longer than any of us have been alive.
SmartmanApps@programming.dev 3 days ago
SmartmanApps@programming.dev 3 days ago
Its because its: 2+5×(8−5)
No it isn’t. It’s 2+5(8−5). Different expression, but in this case co-incidentally the same answer. Preface the first 5 with a Division and you get different answers.
My calculator app
Was written by a programmer who didn’t check the rules of Maths first. The only e-calc I’ve ever seen give the correct answer is MathGPT
not writing it properly
Except it is written properly, as per Maths textbooks
BattleGrown@lemmy.world 2 weeks ago
5(8-5) is perfectly fine, it’s like saying 5 apples
SmartmanApps@programming.dev 3 days ago
it’s like saying 5 apples
5 baskets each with 3 apples actually
axx@slrpnk.net 2 weeks ago
What du you mean, not writing it properly?
SmartmanApps@programming.dev 3 days ago
What du you mean, not writing it properly?
They mean they don’t remember being taught that is the correct way to write it
AwesomeLowlander@sh.itjust.works 2 weeks ago
I have some bad news for you about your education system
SmartmanApps@programming.dev 3 days ago
I have some bad news for you about your education system
It’s not the Education system, it’s people not remembering what they were taught
nomorebillboards@lemmy.world 2 weeks ago
But 2 + 5 + 8 - 5 is 16 - 5 which is 11
buddascrayon@lemmy.world 2 weeks ago
Parentheses first then Division or Multiplication then add or subtract. PEDMAS
8-5= 3 3*5=15 15+2=17
SmartmanApps@programming.dev 3 days ago
then Division or Multiplication
There’s neither, only Addition and Brackets (and Subtraction inside Brackets).
8-5= 3 3*5=15
Nope. 2+5(8-5)=2+(40-25), The Distributive Law, a(b+c)=(ab+ac)
untorquer@lemmy.world 2 weeks ago
Gotta distribute:
2+(8+5)-(5+5)
2+13-0
15
SmartmanApps@programming.dev 3 days ago
Gotta distribute:
Yes, but…
2+(8+5)-(5+5)
You didn’t. 2+5(8-5)=2+(5x8-5x5)
RedAggroBest@lemmy.world 2 weeks ago
Still not how distribution works. That would be:
2+((85)-(55))
2+(40-25)
2+(15)
17
Anything other than 17 is wrong. No matter how you go about your multiplication step.
axx@slrpnk.net 2 weeks ago
Wtf, no, if you distribute you get the same result:
2 + 5(8 - 5) =
2 + (5 × 8) + (5 × -5) =
2 + (40) + (-25) =
2 + 40 - 25 = 2 + 15 = 17
ilinamorato@lemmy.world 2 weeks ago
it’s
a badly
written
math
problem
Seriously, every time this comes up and everyone makes a huge deal out of it, I keep thinking, “none of the people writing these better be teachers.” You have to be more clear than this.
BetterDev@programming.dev 2 weeks ago
no
it’s
fucking
not
This is just basic algebra, this is actually how the problems in algebra I are written. What the fuck?
ilinamorato@lemmy.world 2 weeks ago
Whoa, you went from 0 to 100 on rage super quick. You ok buddy?
SmartmanApps@programming.dev 3 days ago
No it isn’t.
I am, and it’s written correctly
It’s already 100% clear to everyone who remembers the rules of Maths
NONE of them are ambiguous
ilinamorato@lemmy.world 3 days ago
Just patently untrue, but I’m no longer interested in this.
BehindTheBarrier@programming.dev 2 weeks ago
Not this one, there is no ambiguity here. Order of operations are all good.
ilinamorato@lemmy.world 2 weeks ago
You’re right. I honestly just assumed it was one of those intentionally engagement-baiting posts when I saw it and didn’t even process the problem itself.
Quatlicopatlix@feddit.org 2 weeks ago
Yea that is true but a lot of these questions use the division sign when they should just use a fraction and everything would have been easy to understand. If i see the devision sign and there are more than 2 elements like x=a÷b+5 i cry because if they just used x=a/(b+5) or x=a/b +5 it is just visible no ambiguity. (a/b as in a over b, idk how to do fractions on the phone if you know tell me!)
lime@feddit.nu 2 weeks ago
how should it have been written?
ilinamorato@lemmy.world 2 weeks ago
Nope, you’re right. I just read the words and assumed it was one of the terrible ones.
This one is just…math.
VoterFrog@lemmy.world 2 weeks ago
I think it’s reasonable if you consider the kind of physical situation it might represent.
You visit a farm and there are 2 unpackaged apples. There are also 5 packages that hold 8 apples but 5 have been removed from each. How many apples are there?
ilinamorato@lemmy.world 2 weeks ago
In fairness, this one isn’t nearly as bad as most of the ambiguous problems that get passed around on Facebook with multiple parentheticals and such.
Your word problem is excellent.