Adding mixed numbers: 19 3/18 + 18 2/3 (Full video)

Description: Sal adds 19 3/18 + 18 2/3 by rewriting each mixed number to have a common denominator. Created by Sal Khan. Let's add 19 and 3/18 to 18 and 2/3. So 19 and 3/18 is the same thing as 19 plus 3/18. And to that, we are going to add 18 and 2/3, which is the same thing as 18 plus 2/3.

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