Khan/khan-exercises — Issue #9726: Subtraction 1 - Was given same problem three times in a row.
Author: KhanBugz
Created: 2011-12-28 22:15:44+00:00
State: open
Labels: firefox, other, win7

[subtraction_1.html?seed=145&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_1.html?seed=145&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_1.html?seed=145&problem=0&debug&activity=%5B%5B%22correct-activity%22%2C%22%5C%220%5C%22%22%2C4%5D%5D)

["0"]

Mozilla/5.0 (Windows NT 6.1; rv:8.0) Gecko/20100101 Firefox/8.0

MathJax is loaded, ready, queue length: 0