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Visual Multiplication Video
Posted By Jim On 01/26/2012 @ 4:14 pm In Personal Finance | 5 Comments
Need to do some quick multiplication and only have pen and paper? You could multiply the old school way using numbers (gasp!) or you can just draw some lines.
You’re still multiplying, just with lines instead of numbers. One gotcha is to remember the “invisible” lines for zeroes and it gets a little messy when the numbers get larger.
From kottke.org 
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