Khan/khan-exercises — Issue #14060: Adding and subtracting fractions - Adding and Subtracting Fractions
Author: KhanBugz
Created: 2012-02-17 09:55:14+00:00
State: open
Labels: chrome, vista, wrong-or-unclear

Reporter: michelle.mahoney@rocketmail.com

Hi

I started using this yesterday and I thought I had done really well but I don't think some of the answers in the Adding and Subtracting Fractions is correct. I am following the guidance as offered by the tutorial but every question I have completed so far is incorrect. When I have checked the solution, my workings and your workings match, but then the simply of the fractions is completely odd. For example when I simplify the fraction -22/4 I get -11/2 but you somehow arrive at 10/4.

Please could you confirm if this is a problem your end as I would like to use this facility but there is no point if I am given the wrong information.

Thank you

[adding_and_subtracting_fractions.html?seed=87&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_fractions.html?seed=87&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_fractions.html?seed=87&problem=0&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.0) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

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