Khan/khan-exercises — Issue #5762: Subtraction 4 - subtraction 4
Author: KhanBugz
Created: 2011-11-08 00:06:50+00:00
State: open
Labels: ie8, win7

won't let me erase

[subtraction_4.html?seed=18&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_4.html?seed=18&problem=0&debug)

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