Khan/khan-exercises — Issue #5645: Addition 1 - addition1 
Author: KhanBugz
Created: 2011-11-05 22:16:02+00:00
State: open
Labels: firefox, snowleo

in addition 1,I was doing a review and i accidentally got 1 problem wrong.all of a sudden,a hint popped up and my streak bar went back and then up to the spot i was just at.

[addition_1.html?seed=57&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/addition_1.html?seed=57&problem=0&debug)

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Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:7.0.1) Gecko/20100101 Firefox/7.0.1

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