Khan/khan-exercises — Issue #14232: Adding and subtracting negative numbers - Frustration in negative numbers
Author: KhanBugz
Created: 2012-02-20 17:55:21+00:00
State: open
Labels: chrome, hard, win7

I keep getting answers incorrect and I cannot see what I'm doing wrong. I have watched the video but it is still not helping me. For example, 1 - (-8) =. I put -7 but it is incorrect and the correct answer is 9 and I don't understand how.

[adding_and_subtracting_negative_numbers.html?seed=166&problem=MINUS](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=166&problem=MINUS&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=166&problem=MINUS&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%22-7%5C%22%22%2C8%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%5D)

["-7"]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11

MathJax is loaded, ready, queue length: 0