Khan/khan-exercises — Issue #7950: Properties of numbers 2 - wrong
Author: KhanBugz
Created: 2011-12-06 23:22:00+00:00
State: open
Labels: chrome, vista, wrong-or-unclear

Reporter: smward

a answer is wrong

[properties_of_numbers_2.html?seed=169&problem=additive-inverse](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_2.html?seed=169&problem=additive-inverse&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_2.html?seed=169&problem=additive-inverse&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%229961%5C%22%22%2C16%5D%2C%5B%22incorrect-activity%22%2C%22%5C%229961%5C%22%22%2C2%5D%2C%5B%22incorrect-activity%22%2C%22%5C%229961%5C%22%22%2C2%5D%2C%5B%22incorrect-activity%22%2C%22%5C%229961%5C%22%22%2C0%5D%2C%5B%22incorrect-activity%22%2C%22%5C%229961%5C%22%22%2C0%5D%2C%5B%22incorrect-activity%22%2C%22%5C%229961%5C%22%22%2C0%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22incorrect-activity%22%2C%22%5C%229961%5C%22%22%2C10%5D%2C%5B%22incorrect-activity%22%2C%22%5C%220%5C%22%22%2C9%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%5D)

["9961","9961","9961","9961","9961","9961","9961","0"]

Mozilla/5.0 (Windows NT 6.0) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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