Graphical multiplication
 

This is cool. The video calls is Japanese multiplication, but it would be interesting to find out what branch of mathematics (like topology or something) that this is derived from.

http://www.youtube.com/watch?feature...&v=e-P5RGdjICo

Re: Graphical multiplication
 

Very cool!

Re: Graphical multiplication
 

Thanks for sharing Mark. That was very interesting! I am gonna give it a try myself.

Re: Graphical multiplication
 

Mostly algebra...

21 * 13
(20 + 1) * (10 + 3)
20 * 10 + 20 * 3 + 1 * 10 + 1 * 3
2*1 * 100 + (2*3 + 1*1) * 10 + 1*3 * 1

Re: Graphical multiplication
 

Cool brother...thanks for sharing :tu

Re: Graphical multiplication
 

that was very interesting thanks for sharing

Re: Graphical multiplication
 

:eek:

Re: Graphical multiplication
 

Ok, it matters apparently where you put those arcs, but how do you determine where they go?

Re: Graphical multiplication
 

:tu

Re: Graphical multiplication
 

Really cool. I will have to look into this some more.

Re: Graphical multiplication
 

Wow amazing, gonna try it now!

Re: Graphical multiplication
 

Interesting concept...I'm gonna try it out on some new ones and see if it works.

Re: Graphical multiplication
 

I just blew some peoples minds at work!
They insisted on getting a calculator to double check, it worked multiple times.
Just don't us any 7s, 8s or 9s!!! To many intersections to count!

Re: Graphical multiplication
 

:r But I would assume it still works?

Re: Graphical multiplication
 

Yah I did it with a '6' and it still worked, I had to count it like three times though.

Re: Graphical multiplication
 

its math. i will pass. gandalf be damned.