Multiplication as scaling with fractions (Full video)

Khan Academy
Supporting grades: 5

Description: This video shows how to compare the following expressions by thinking about multiplication as scaling: 2/3 × 7/8, 8/7 × 2/3, and (5 × 2)/(3 × 5). The second expression is 8/7 times 2/3. And what I want you to do is pause this video right now and think about which of these expressions is the largest, which one is in the middle in terms of value, and which one is the smallest. If you could just look at them and figure out which of these is the largest, which of these is the smallest, and which of these is in the middle.

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