Khan/khan-exercises — Issue #5593: Adding negative numbers - I  was right
Author: KhanBugz
Created: 2011-11-04 20:54:46+00:00
State: open
Labels: firefox, win7

I was right on a answer,but it said I was wrong.Five people said I was right as well.

[adding_negative_numbers.html?seed=54&problem=PLUS](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_negative_numbers.html?seed=54&problem=PLUS&debug)

["13","-13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13","13"]

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

MathJax is loaded, ready, queue length: 0