http://www.srisathyasaividyavahini.org/index.php/forum/8-mat...

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Note added at 24 minutos (2013-08-14 19:35:37 GMT)
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Of course, normal multiplication can get boring. Here's the
secret: shortcuts. You might think of numbers as a dreary line
from 0 to forever. Numbers do go on forever, but you can also
think of them as cycles. Ten ones make 10. Ten tens make 100.
Ten hundreds make 1000

http://www.abcteach.com/free/m/mulitplication_quicktricks_el...

http://gwydir.demon.co.uk/jo/numbers/finger/multiply.htm

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Note added at 29 minutos (2013-08-14 19:41:08 GMT)
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THROUGH FINGERS

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