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/sci/ - Science & Math

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2219046 No.2219046 [Reply] [Original]

Guys

Seriously you guys

Look at this shit.

http://www.geekologie.com/2010/12/how_to_multiply_numbers_by_doo.php

>> No.2219058
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2219058

>> No.2219062

It works I guess, but seems like a waste of paper and is apparently limited to only two numbers.

>> No.2219076

>>2219062
man I don't think I've ever done long multiplication of more than two numbers at a time

does that even work

>> No.2219084
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2219084

but how do you do an equasion if there's a 0

>> No.2219085
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2219085

>> No.2219091

Yea but its not that much faster than actually doing it out long hand. And its better to actually know how to multiply, since it's not rocket science, and its better than just memorizing a way of drawing lines that give you the answer

>> No.2219098

>>2219084
Then it would equal zero, because there wouldn't be any intersections.

>> No.2219108

>>2219091
That's the wrong way of thinking about it. Here we have a visual representation of the multiplication operation which gives us digits in the base we're working in. It's pretty cool to think about why this works the way that it does.

>> No.2219118

now do 98 x 75

trololo

>> No.2219123

How is this any easier than:

= 21 * 13
= 21 * (10 + 3)
= 21 * 10 + 21 * 3
= 210 + 63
= 273

>> No.2219277

>>2219085
That's same base number. That jap thing works with 143x65 just as easily
>>2219123
It's not; it's more fun!

>> No.2219692
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2219692

>>2219123
This!
Or
21 x 13
2(10*13) + 13
2*130 + 13
260 + 13
273

>> No.2219720
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2219720

98 * 76
>his face when

>> No.2219737

>>2219720
7600-76*2

>> No.2219739

>turn on calculator
>push buttans
>recieve answer
i do not understand why anyone would bother with this dicktarded method of arithmetic

>> No.2219745

Calculator master race reporting in

>> No.2219751

I hate how people think this, THIS!!!, is "being good at math."