Khan/khan-exercises — Issue #15261: Adding and subtracting negative numbers - 6−(−9)=? 
Author: KhanBugz
Created: 2012-03-02 19:54:27+00:00
State: open
Labels: hard, ie8, ie9, win7

[adding_and_subtracting_negative_numbers.html?seed=50&problem=MINUS](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=50&problem=MINUS&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=50&problem=MINUS&debug&activity=%5B%5D)

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