ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC)

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Printable Version

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ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - TKWizard - 2010-12-14

[video]www.youtube.com/watch?v=e-P5RGdjICo[/video]

Dang hes clever...

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Link - 2010-12-14

I wish I could go back to math class now.

[video=youtube;e-P5RGdjICo]http://www.youtube.com/watch?v=e-P5RGdjICo[/video]

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Solarboy - 2010-12-14

Wait... wha.. the fu... how does it....? What!?

Anyone mind explaining to me how this works pelase?

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Link - 2010-12-14

Solarboy Wrote:Wait... wha.. the fu... how does it....? What!?

Anyone mind explaining to me how this works pelase?

Isn't it obvious? The first set of digits go one way while the other go another way.

1 x 2

| and =

If you get double digits, the first digit of the number gets added to the second digit of the previous number.

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Kunagisa - 2010-12-14

Sure is Ika Musume in here.

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Dusk - 2010-12-14

This is the exact same as regular, digit-by-digit multiplication, except drawn with lines instead of numbers in a way that makes it look unique.

Notice the video only uses 1s, 2s, and 3s. Attempting this method with higher numbers would illustrate why we memorize multiplication tables so that we don't have to use this method. This is a primitive form of the same thing you do on a daily basis.

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Mute - 2010-12-14

Kunagisa Wrote:Sure is Ika Musume in here.

Who?

and wow this is amazing...
dang japanese, doing things that make everyone else look like troglodytes. >_>

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - DeanNim - 2010-12-14

Mute Wrote:Who?

and wow this is amazing...
dang japanese, doing things that make everyone else look like troglodytes. >_>

ika museum.

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - xLeviathan - 2010-12-14

Interesting. I saw this on Gizmodo, haha. Very weird, but neat.

I still came in expecting a reproduction topic. :<

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Mike - 2010-12-14

that's pretty badass

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - ThatWasMyKil - 2010-12-14

oh i like this way. Big Grin

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Felicitates - 2010-12-14

[video=youtube;b5AWQ5aBjgE]http://www.youtube.com/watch?v=b5AWQ5aBjgE&feature=related[/video]

those dang japanese.....

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Mike - 2010-12-14

what did japanese numbers look like before they began using the latin ones?

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Eos - 2010-12-14

Delicae Wrote:those dang japanese.....

That's just a standard retail fold Rolleyes

Solarboy Wrote:Anyone mind explaining to me how this works pelase?

And as a commenter already explained:

Quote:It's the distributive property:

123 * 321

= (100 + 20 + 3) * (300 + 20 + 1)

= 100 * 300 + 100 * 20 + 100 * 1 + 20 * 300 + 20 * 20 + 20 * 1 + 3 * 300 + 3 * 20 + 3 * 1

The lines just help you do the FOIL (rather slowly). And he only did simple examples where he didn't have to carry much.

I seriously doubt this is "how Japanese multiply" unless the figure is small enough to keep track of in their head.

Square One used to do similar tricks.

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Kunagisa - 2010-12-14

Mute Wrote:Who?

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - xAyakoCx - 2010-12-14

Kunagisa Wrote:

Screw Higher Maths, Foundation Maths is easier +A+. I wish Ika Musume helped me with my maths homework :< Or is it the guy?

OT: CLEVER.

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Kunagisa - 2010-12-14

xAyakoCx Wrote:I wish Ika Musume helped me with my maths homework

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Mute - 2010-12-14

Mike Wrote:what did japanese numbers look like before they began using the latin ones?

http://lmgtfy.com/?q=kanji+numerals

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - Takebacker - 2010-12-14

Kunagisa Wrote:

what anime is that?

ITT: How do Japanese Multiply (NOT A REPRODUCTION TOPIC) - xAyakoCx - 2010-12-14

Takebacker Wrote:what anime is that?

Ika Musume o-o
Yes, the one with a bunch of Shinryaku in the opening.