Khan/khan-exercises — Issue #15080: Subtraction 4 - scratchpad
Author: KhanBugz
Created: 2012-03-01 04:00:21+00:00
State: open
Labels: chrome, other, vista

only works the first time you try it not the second time.

[subtraction_4.html?seed=64&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_4.html?seed=64&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_4.html?seed=64&problem=0&debug&activity=%5B%5D)

[]

Mozilla/5.0 (Windows NT 6.0) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

MathJax is loaded, ready, queue length: 0