Khan/khan-exercises — Issue #11544: Subtraction 4 - dont understand
Author: KhanBugz
Created: 2012-01-18 20:00:51+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

[subtraction_4.html?seed=120&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_4.html?seed=120&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_4.html?seed=120&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%221547%5C%22%22%2C20%5D%2C%5B%22hint-activity%22%2C%220%22%2C1%5D%5D)

["1547","1547"]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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