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Topic: Math without calculator (must watch)
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yahooji82@gmail.com

Posts: 4
Registered: 10/28/12
Math without calculator (must watch)
Posted: Jul 25, 2013 9:20 PM
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He goes from simple calculations to complex without calculator. I just wanted to share. I hope it is also useful to others.

http://www.youtube.com/watch?v=JQvPP7AcFWo



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