Khan/khan-exercises — Issue #15211: Properties of numbers 1 - hard
Author: KhanBugz
Created: 2012-03-02 00:52:45+00:00
State: open
Labels: hard, ie8, ie9, win7

ITS 2 HARD ITS KEEPS ON SETTING Back my meter.

[properties_of_numbers_1.html?seed=120&problem=associative-show-left](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_1.html?seed=120&problem=associative-show-left&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_1.html?seed=120&problem=associative-show-left&debug&activity=%5B%5D)

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