Anonymous at Wed, 6 Nov 2024 17:25:58 UTC No. 16465120

I'm black + jewish

Anonymous at Wed, 6 Nov 2024 17:29:17 UTC No. 16465122

>>16465116
I mean, that's not even that hard to do even for a midwit like me. You just move the decimal point over twice and then .75+.75=1.5 then double it for 3.

My friends like to go shopping with me because I can calculate the taxes for them because just moving decimal points over is the simplest shit in the world.

Anonymous at Wed, 6 Nov 2024 17:34:46 UTC No. 16465130

>>16465120
jamal ginsberg?

Anonymous at Wed, 6 Nov 2024 17:35:44 UTC No. 16465132

>>16465122
normies can't even understand scientific notation. Fractions and decimals scare them.

Anonymous at Wed, 6 Nov 2024 19:15:22 UTC No. 16465253

>>16465116
>n * x/100 = x * n/100
Don't you learn this in like, 5th grade?

Anonymous at Wed, 6 Nov 2024 23:22:28 UTC No. 16465459

>>16465122
>You just move the decimal point over twice and then .75+.75=1.5 then double it for 3.
what kind of fucking math is that?

>My friends like to go shopping with me because I can calculate the taxes for them
do Americans really?

Anonymous at Thu, 7 Nov 2024 07:39:36 UTC No. 16465848

>>16465459
>what kind of fucking math is that?
Very Basic: 4% = (1%+1%)*2
1% of 75 is easily calculated as .75 by moving decimals.

Anonymous at Thu, 7 Nov 2024 15:52:44 UTC No. 16466099

>>16465116
4% is 1/25. You should be able to divide 75 by 25 in your head instantly.

Anonymous at Thu, 7 Nov 2024 15:55:30 UTC No. 16466106

>>16465459
It's called arithmetic.
0.04*75 = 4*(1/100)*75 = 2*2*0.75 = 2*1.5 = 3

Anonymous at Thu, 7 Nov 2024 18:39:32 UTC No. 16466239

>>16465116
I was today years old when I learned about percentages

Anonymous at Thu, 7 Nov 2024 19:19:38 UTC No. 16466287

Easy when you realize that 4% of 75 = 4 * (1/100) * 75 = 75 * (1/100) * 4

Anonymous at Fri, 8 Nov 2024 01:41:45 UTC No. 16466670

>>16465120
So you're bluish?

Anonymous at Fri, 8 Nov 2024 01:42:45 UTC No. 16466671

>>16465130
No, Whoopi Goldberg.

Anonymous at Fri, 8 Nov 2024 02:04:03 UTC No. 16466685

>>16466287
>>16466106
you guys make it so much more complex than it has to be. This >>16465848 is how you do math in your head. You simplify it as much as possible. You just figure out what 1% is, which is .75 and try to get it to 4%. So if you add it, you know already that it has to get to four and you can skip a step and just double it. So rather than going .75+.75+.75+.75 you do (.75+.75)*2.

It's like when you're adding a bunch of numbers. You find match the ones that make 10s. So if you're adding 5+2+7+3+8+5 you don't go left to right, you go 5+5+7+3+8+2. I'm 99% sure this is how everyone does basic math in their head.

So if you spend $120 and have 7% sales tax, you know that 1% is 1.20 and just multiple the 1 x 7 to get 7 and then the .2 to get 1.4 then add those together to get 8.4. $128.4 including tax. The simple ability to do this absolutely stunned my friends in college (I went to art school and all my friends were female photographers).

Anonymous at Fri, 8 Nov 2024 02:47:55 UTC No. 16466702

>>16466685
>you guys make it so much more complex than it has to be. This >>16465848 # is how you do math in your head. You simplify it as much as possible.
That's literally the same thing, retard.

Anonymous at Fri, 8 Nov 2024 03:00:37 UTC No. 16466711

>>16466702
actually writing out the 4*(1/100) makes it look like an extra step of doing actual math when just knowing to move it two decimals overseems automatic. Technically they are teh same thing, but writing it out that way rather than just saying "lol move it over two" psychologically makes it seem more complex. Like, you've written out how the math is technically done rather than how you would do it in your head.

While >>16465848 is saying "you know to move two decimals and to double it after" is skipping the technical steps. Like just knowing your multiplication tables rather than writing it down at all.

Man, it's a psychological thing is what I'm getting at. One way just looks more complicated than the other even though they are the same.

Anonymous at Fri, 8 Nov 2024 03:03:38 UTC No. 16466715

imagine /sci/ gets this excited about basic arithmetic

Anonymous at Fri, 8 Nov 2024 03:07:44 UTC No. 16466718

>>16466711
Nobody's saying you have to write it out (and when you're doing it in your head you're not writing out anything), it's just the explanation of why it works for confused people like >>16465459.

Anonymous at Fri, 8 Nov 2024 04:21:14 UTC No. 16466789

>>16466718
Every teacher from first grade to graduation expects you to show your work. Write everything out autodidact fag.

Anonymous at Fri, 8 Nov 2024 04:50:02 UTC No. 16466811

>>16466789
I have a university education in mathematics.

Anonymous at Fri, 8 Nov 2024 06:54:55 UTC No. 16466874

so as a math retard, what's the best way (easiest in head) to solve?

Anonymous at Fri, 8 Nov 2024 06:57:55 UTC No. 16466876

>>16466811
Of course, all turbo schizo autodidacts pick a couple of those up when they are 12 or 13. Doesn't change the fact that nobody knows what you did when you die.

Anonymous at Fri, 8 Nov 2024 07:27:30 UTC No. 16466893

>>16465120
Quintavius Goldschmidt

Anonymous at Fri, 8 Nov 2024 15:00:25 UTC No. 16467202

>>16466789
I took all AP mathematic courses in highschool and I always got shit for never showing my work. If I can just do it in my head, I don't know why I have to write it down. For the more complex problems you have to or it would be literally impossible to solve unless you were some autistic savant but still. I went the art route rather than STEM though. Painting is a lot more fun than doing math. I originally wanted to be an architect in highschool but it turned out I like designing the buildings more than actually making them structurally sound. So I became a concept artist in the video game industry. I get to design buildings all day long and don't have to do any o the math to go along with it.

Anonymous at Fri, 8 Nov 2024 15:01:39 UTC No. 16467206

The fuck.. I never knew about this. Math is taught so fucking wrong.

Anonymous at Fri, 8 Nov 2024 15:06:24 UTC No. 16467213

>>16467206
it's fine, I don't understand zoomer math at-fucking-all. Getting rid of the order of operations for basic level math is incredibly stupid and you have to learn it anyways if you plan on doing even the most basic of algebra.

Anonymous at Fri, 8 Nov 2024 20:05:38 UTC No. 16467509

>>16467206
Just learn algebra and recognize that numbers are made out of other numbers that can usually be manipulated into a simple arithmetic problem.

Anonymous at Fri, 8 Nov 2024 20:29:45 UTC No. 16467523

>>16465116
What is so hard about computing 75*4*10^-2 mentally? And why would you do that anyways do you not have a phone? Are you poor? Yikes