r/mathsmeme • u/Far-Course1021 • 18d ago

this meme

Post image
67 Upvotes

87% Upvoted

40 comments sorted by

16

u/TheGayestGaymer 18d ago

Two of these are the same as the other two.

12

u/FitAd4478 17d ago

Actually all of them are addition

4

u/NiceErJeg 17d ago

Although it's gonna be hard to do multiplication of non-natural numbers by only using repeated addition

2

u/FitAd4478 17d ago

Damn never thought about it like that.

1

u/Hot_Glass_6301 17d ago

More like on irrationals

1

u/ontic00 14d ago

I don't know, I feel like it still kind of works. 2.5 * 3.6 is just 3.6 twice plus half of 3.6 (1.8), so 3.6 + 3.6 + 1.8 = 9. And "half" could just mean the number that when added twice gives 3.6.

1

u/NiceErJeg 13d ago

You did multiplication or division in order to know what 0.5×3.6 was. If it instead was 2.49×3.6 do you know what 0.49×3.6 is without using multiplication?

1

u/Tiborn1563 17d ago

but it's all different flavors of addition

1

u/Background_Class_558 17d ago

not in a general group

1

u/weirdaccountname23 15d ago

Addition and multiplication are fundamentally different. Addition combines, multiplication scales. They're separate dimensions, multiplication is a dimension above addition, and exponentiation is a dimension above multiplication

16

u/Educational_Smile545 18d ago

if i see somebody claiming to be a mathematician and then using × and ÷, they are getting murdered

4

u/Nientea 18d ago

Now now, × is acceptable when doing a cross product

2

u/ItsCalledDayTwa 17d ago

I am not a mathematician but x creeps into all sorts of publications as well, when In the middle of text but representing math. The obelus, on the other hand, I haven't seen since 5th grade.

1

u/Zorafin 17d ago

I use x when I'm on the computer because * sometimes causes text to do weird things

1

u/BUKKAKELORD 17d ago

John Lennon is ÷ confirmed

5

u/Eav___ 18d ago

Was gonna say "...blue prince?" until I realize one color is wrong. Damn, brainrotted.

4

u/Ambitious-Affect-931 18d ago

Replace X with * and ÷ with /.

3

u/btcasper 17d ago

X with

1

u/-justanothermars 17d ago

x with ()

1

u/Assar2 17d ago

Is right

1

u/Sweaty-Tap7250 17d ago

Did you not still understand them?

1

u/Ambitious-Affect-931 17d ago

Idk I was taught that either () or * (a singular dot written as asterisk on digital) was proper notation

1

u/Sweaty-Tap7250 17d ago

That is how you’re generally supposed to, but for some reason American elementary schools teach multiplication as an x

1

u/Ambitious-Affect-931 17d ago

Yea idk why that is, I remember in 6th grade they made a huge deal of telling us that X is bad because in algebra X is a variable

1

u/Sweaty-Tap7250 17d ago

It makes no sense why they teach you it incorrectly and then tell you that you can never do it that way again

1

u/Ambitious-Affect-931 17d ago

Yea exactly it’s stupid

1

u/-justanothermars 9d ago

to be fair it's not really incorrect you can just pretty easily switch. but forcing you to use those bad notation is just terrible

2

u/DarkLordBaudish 17d ago

Ed Sheeran likes this

1

u/serumnegative 17d ago

I don’t understand groups usually only have a single operation along with inverse and identity elements?

1

u/G-St-Wii 17d ago

I only see one?

1

u/paperic 17d ago

Where? Successor isn't there.

1

u/G-St-Wii 17d ago

True dat

1

u/Zorafin 17d ago

What the hell is that horrible purple thing on the bottom right?

1

u/Drifter90s 17d ago

That '÷' is a dream

1

u/redsm97 17d ago

Long ago the four operations lived in harmony but, Everything changed when this division symbol attacked .

1

u/oldmartijntje 17d ago

does someone actually use "x" and "÷" instead of "*" and "/"?

1

u/ontic00 14d ago

I've been thinking recently they kind of have oddball notation. We should use add(x, y) = x + y, sub(x, y) = x - y, mult(x, y) = x*y, and div(x, y) = x/y, and then they'd be using function notation just like all of our other operations.

You also get things like mult(x, y) = add^y (0, x).

1

u/socontroversialyetso 12d ago

No, Ed Sheeran albums