Khan/khan-exercises — Issue #14688: Addition 1 - sterling dondero
Author: KhanBugz
Created: 2012-02-26 15:19:50+00:00
State: open
Labels: chrome, hard, xp

[addition_1.html?seed=172&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_1.html?seed=172&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_1.html?seed=172&problem=0&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11

MathJax is loaded, ready, queue length: 0