Khan/khan-exercises — Issue #13125: Pre-algebra challenge - video needed
Author: KhanBugz
Created: 2012-02-05 21:38:18+00:00
State: open
Labels: lion, other, safari

Reporter: ianrolle@yahoo.com

i need the video for my son so he can grasp the concept easier

[pre-algebra_challenge.html?seed=7&problem=23 (exponents_3)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=7&problem=23&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pre-algebra_challenge.html?seed=7&problem=23&debug&activity=%5B%5D)

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