Khan Academy

Supporting grades: 5

Description: Sal subtracts 3 2/5 from 7 6/9 by rewriting each mixed number to have a common denominator. Created by Sal Khan. Let's try to evaluate 7 and 6/9 minus 3 and 2/5. So let me think about what 6/9 minus 2/5 are. 6/9 minus 2/5, well, we're going to have to find a common denominator.

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