Khan/khan-exercises — Issue #12125: Adding and subtracting negative numbers - Not understanding
Author: KhanBugz
Created: 2012-01-25 21:05:13+00:00
State: open
Labels: firefox, other, xp

I do not understand 8-

[adding_and_subtracting_negative_numbers.html?seed=47&problem=MINUS](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=47&problem=MINUS&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=47&problem=MINUS&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22-15%5C%22%22%2C16%5D%2C%5B%22incorrect-activity%22%2C%22%5C%22-1%5C%22%22%2C20%5D%2C%5B%22incorrect-activity%22%2C%22%5C%221%5C%22%22%2C4%5D%5D)

["-15","-15","-1","1"]

Mozilla/5.0 (Windows NT 5.1; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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