Khan/khan-exercises — Issue #8413: Adding and subtracting negative numbers - adding and subtracting negative numbers
Author: KhanBugz
Created: 2011-12-12 14:20:25+00:00
State: open
Labels: firefox, snowleo, wrong-or-unclear

wont listen to me

[adding_and_subtracting_negative_numbers.html?seed=186&problem=PLUS](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=186&problem=PLUS&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=186&problem=PLUS&debug&activity=%5B%5D)

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Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13

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