Khan/khan-exercises — Issue #6823: Subtraction 3 - i  do  not  now  who too  do  it  
Author: KhanBugz
Created: 2011-11-21 19:16:58+00:00
State: open
Labels: firefox, hard, vista

[subtraction_3.html?seed=115&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_3.html?seed=115&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_3.html?seed=115&problem=0&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.0; rv:8.0) Gecko/20100101 Firefox/8.0

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