Khan/khan-exercises — Issue #15034: Subtraction 2 - problem
Author: KhanBugz
Created: 2012-02-29 21:55:20+00:00
State: open
Labels: chrome, hard, xp

Reporter: student.ldelacruz@mycis.303

why is this problem so hard

[subtraction_2.html?seed=0&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_2.html?seed=0&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/subtraction_2.html?seed=0&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22408%5C%22%22%2C97%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22508%5C%22%22%2C7%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22608%5C%22%22%2C5%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22518%5C%22%22%2C30%5D%5D)

["408","508","608","518"]

Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

MathJax is loaded, ready, queue length: 0