Khan/khan-exercises — Issue #7006: Adding and subtracting fractions - Wrong answer?
Author: KhanBugz
Created: 2011-11-24 02:46:31+00:00
State: open
Labels: firefox, snowleo, wrong-or-unclear

Reporter: R3hall@hotmail.com

I have worked this out several ways, even with a calculator and I get -37/28. The program keeps frowning at me.

[adding_and_subtracting_fractions.html?seed=42&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_fractions.html?seed=42&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_fractions.html?seed=42&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2237%2F28%5C%22%22%2C131%5D%2C%5B%22incorrect-activity%22%2C%22%5C%221%209%2F28%5C%22%22%2C348%5D%5D)

["37/28","1 9/28"]

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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