How Chinese Multiply
Ever wondered how Chinese multiply so quickly? Ravi sent me this video a while ago and I did not see it thinking it may have objectionable content! When I saw it, I was amazed!
Could you ever think of this? It’s a great maths trick. I don’t know how it would multiply 10 x 10, or for that matter any number which is a 10 multiple. Do you have an idea?
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A wasteful activity indeed.
Kapil
1 Dec 08 at 3:51 pm
Wounder full!!
I like it,
Arun Bagul
5 Dec 08 at 7:10 pm
Useless stuff….what happens if you have to multiply 988 with 789…you’ll be left with lots of lines…..only useful if u have 2-3 digit numbers with small digit value
Abhishek Kumar
5 Dec 08 at 8:03 pm
To multiply 10×10 and the like, you could multiply the value of the last set of dots of a number by 10.
Then again, while that works for something simple like 23*40, it still doesn’t directly work for 10*10. So not quite there yet. Still, interesting!
Though seriously, just use a calculator.
James
29 Dec 08 at 2:40 am
Of course it works for 10×10! You just have to imagine a non-line without intersections. if you draw the 0 non-line dashed you obtain two intersecting dashed lines, two intersections between a dashed line and a solid line, and one proper intersection. From that you can see the proper placement of the 1.
goesta
29 May 09 at 2:00 am