Khan/khan-exercises — Issue #6621: Properties of numbers 2 - it ses add and u have to mines 
Author: KhanBugz
Created: 2011-11-18 14:10:12+00:00
State: open
Labels: ie8, other, xp

Reporter: garrettshark@gmail.com

[properties_of_numbers_2.html?seed=150&problem=additive-inverse](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_2.html?seed=150&problem=additive-inverse&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_2.html?seed=150&problem=additive-inverse&debug&activity=%5B%5D)

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