Khan/khan-exercises — Issue #6775: Properties of numbers 2 - This question requires lesson not yet taught.
Author: KhanBugz
Created: 2011-11-21 02:58:49+00:00
State: open
Labels: firefox, hard, snowleo

Reporter: jordandavidcarr@gmail.com

Hello,

I was just working through your site and noticed that this question requires the use of fractions to solve. Fractions have not yet been introduced before these questions.

The videos are explaining multiplication by zero and one but not by 1/x.

Thanks :)

Your site is great btw!

[properties_of_numbers_2.html?seed=149&problem=multiplicative-inverse](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_2.html?seed=149&problem=multiplicative-inverse&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/properties_of_numbers_2.html?seed=149&problem=multiplicative-inverse&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C127%5D%5D)

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Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.24) Gecko/20111103 Firefox/3.6.24

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