Easy mental multiplication - Chicagoland Sportbikes
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post #1 of 5 (permalink) Old 11-25-2006, 06:16 PM Thread Starter
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Easy mental multiplication

There was a thread recently about doing math mentally. Here's the interesting easy multiplication method (video):

http://www.metacafe.com/fplayer/2969...tion_trick.swf

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post #2 of 5 (permalink) Old 11-25-2006, 06:32 PM
 
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I'd lose track of which corner goes with what place in the number and write it backwards or something
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post #3 of 5 (permalink) Old 11-25-2006, 10:09 PM
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I'm officially a nerd because I found that really cool.
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post #4 of 5 (permalink) Old 11-25-2006, 10:32 PM
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Line representation of the 'lattice method', but yes.. another cool way to arrive at the same answer.

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post #5 of 5 (permalink) Old 11-26-2006, 11:57 AM
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