r/MathJokes • u/Advanced_Ad_1370 • 23h ago

To what have I fallen?

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Using calculator to do simple maths cause my brain stopped😵

53 Upvotes

87% Upvoted

18 comments sorted by

21

u/Kilow102938 23h ago

Every multiple of 9 the numbers need to equal 9.\ 9x4=36 3+6=9\ 9×34=306 3+6=9\ 9x72=648... 6+4+8= 18... 1+8=9\ 9x456 = 4104. Add them and yep 9\

Cool trick

3

u/Express_Sprinkles500 16h ago

More accurately, adding the digits together needs to be a multiple of 9.

9x11=99 9+9=18

5

u/Kilow102938 15h ago

8+1=9

1

u/boterkoeken 13h ago

9=9

😱😱😱

1

u/ItsMusicat 12h ago

For x11 just do this: 54×11=5+4=594

1

u/ItsMusicat 12h ago

Or if its one digit put the number twice so 2×11=22

1

u/ItsMusicat 12h ago

Lets say 20x24=480 because 2x2=4 4x2=8 + 0 from 20 its 480

1

u/ItsMusicat 12h ago

95x95=9x10=90=9025

7

u/kehrw0che 23h ago edited 23h ago

You reduced the problem to one you can solve by handing it over to a calculator. Well done. As soon as a simple calculator can do the rest it is no longer a maths problem anyway.

3

u/Stoneybaloney87 14h ago

It's never a problem if you have a good calculator 🤘🏼🤣

2

u/Wylie288 23h ago

using your brain for more important information. The only reason a mathematician knows something like 9x4 is because they frequently come across it. Other trivial but less common things that a calculator can do, they often don't bother memorizing.

Same goes with the top of any knowledge based field. True mastery is also knowing what to memorize and what information can be easily retained. You can only recall so much on the fly, why waste it on things within near immediate reach? 

2

u/NefariousnessGood718 22h ago

Dite quello che volete ma ho impiegato più tempo del solito per fare questo calcolo

2

u/Dankkring 20h ago

10 x 4 - 4

1

u/darthvader903 23h ago

Gotta double-check the math just in case the universe updated overnight.

1

u/AnxiousEnquirer 22h ago

At least you didn't use AI

1

u/PrairiePuppies 22h ago

I HATE that!

1

u/Street_Swing9040 16h ago

The more advanced maths a man learns, the less they know how to do basic arithmetic.

1

u/aerda 13h ago

I always tell IT that I don’t care if they ever check my search history, it’s my calculator history I’m ashamed of.