Khan/khan-exercises — Issue #4176: Adding and subtracting negative numbers - -3--9
Author: KhanBugz
Created: 2011-10-11 21:25:41+00:00
State: open
Labels: ie8, win7

[adding_and_subtracting_negative_numbers.html?seed=66&problem=PLUS](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=66&problem=PLUS)

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Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.3; Tablet PC 2.0)

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