Khan/khan-exercises — Issue #12471: Subtraction 4 - math is hard
Author: KhanBugz
Created: 2012-01-30 19:33:52+00:00
State: open
Labels: firefox, hard, xp

the videos arent clear enough some of them ;0

[subtraction_4.html?seed=160&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_4.html?seed=160&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_4.html?seed=160&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%222237%5C%22%22%2C41%5D%5D)

["2237"]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8

MathJax is loaded, ready, queue length: 0