Khan/khan-exercises — Issue #5347: Adding and subtracting negative numbers - flash
Author: KhanBugz
Created: 2011-11-01 17:06:02+00:00
State: open
Labels: firefox

every time i got a prob correct,the screen flashes and the energy bar goes down

[adding_and_subtracting_negative_numbers.html?seed=11&problem=MINUS](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=11&problem=MINUS&debug)

[]

Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9.2.20) Gecko/20110803 Firefox/3.6.20

MathJax is loaded, ready, queue length: 0