Khan/khan-exercises — Issue #7828: Addition 4 - wefe
Author: KhanBugz
Created: 2011-12-05 19:27:54+00:00
State: open
Labels: chrome, other, win7

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[addition_4.html?seed=134&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_4.html?seed=134&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_4.html?seed=134&problem=0&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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