Khan/khan-exercises — Issue #12622: Addition 1 - IDK
Author: KhanBugz
Created: 2012-01-31 23:01:14+00:00
State: open
Labels: chrome, wrong-or-unclear, xp

it says undefined+undefined=? I dont understand the question.

[addition_1.html?seed=193&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_1.html?seed=193&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_1.html?seed=193&problem=0&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C8%5D%5D)

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Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

MathJax is loaded, ready, queue length: 0