Khan/khan-exercises — Issue #5166: Addition 1 - MATH
Author: KhanBugz
Created: 2011-10-29 07:46:59+00:00
State: open
Labels: ie8, ie9, win7

[addition_1.html?seed=130&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_1.html?seed=130&problem=0&debug)

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