Khan/khan-exercises — Issue #13453: Addition 4 - backspace problem...
Author: KhanBugz
Created: 2012-02-09 04:50:09+00:00
State: open
Labels: chrome, other, win7

Reporter: davidh9

when i backspaced on the it left the old question their and continued to do the same thing.

[addition_4.html?seed=65&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_4.html?seed=65&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_4.html?seed=65&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%226327%5C%22%22%2C14%5D%2C%5B%22correct-activity%22%2C%22%5C%22637%5C%22%22%2C13%5D%5D)

["6327","637"]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

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