Common Core Alignment:.

5.NF.5b:

Number And Operations - Fractions

Apply And Extend Previous Understandings Of Multiplication And Division To Multiply And Divide Fractions.

Explaining why multiplying a given number by a fraction greater than 1 results in a product greater than the given number (recognizing multiplication by whole numbers greater than 1 as a familiar case); explaining why multiplying a given number by a fraction less than 1 results in a product smaller than the given number; and relating the principle of fraction equivalence a/b = (n x a)/(n x b) to the effect of multiplying a/b by 1.