Khan/khan-exercises — Issue #11473: Subtraction 1 - subraction video
Author: KhanBugz
Created: 2012-01-17 23:28:00+00:00
State: open
Labels: other, safari, snowleo

could not hear well

[subtraction_1.html?seed=31&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_1.html?seed=31&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_1.html?seed=31&problem=0&debug&activity=%5B%5B%22correct-activity%22%2C%22%5C%222%5C%22%22%2C6%5D%5D)

["2"]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/534.52.7 (KHTML, like Gecko) Version/5.1.2 Safari/534.52.7

MathJax is loaded, ready, queue length: 0