Khan/khan-exercises — Issue #10759: Properties of numbers 1 - properties  of  numbers  1
Author: KhanBugz
Created: 2012-01-09 18:22:21+00:00
State: open
Labels: firefox, hard, vista

i do not no properties of numbers 1

[properties_of_numbers_1.html?seed=53&problem=associative-show-left](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_1.html?seed=53&problem=associative-show-left&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_1.html?seed=53&problem=associative-show-left&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.0; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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