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Madness In My Method
Math tricks
Math tricks
Dec
.
6th
,
2007
10:57 am
trickykitty
Multiplication in 3 seconds
Large multiplication using a picture of lines
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Date:
2007-12-12 05:33 am (UTC)
From:
sexymathteacher.livejournal.com
totally amazing. I'm adding an abacus to mine and Thad's Santa list.
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Date: 2007-12-12 05:33 am (UTC)