Grade 5 · Number and Operations—Fractions

CCSS.MATH.CONTENT.5.NF.B.4b

Find the area of a rectangle with fractional side lengths by tiling it with unit squares of the appropriate unit fraction side lengths, and show that the area is the same as would be found by multiplying the side lengths. Multiply fractional side lengths to find areas of rectangles, and represent fraction products as rectangular areas.

Read this standard on the official Common Core site

Lessons that teach this standard

• Multiplying Fractions: Top Times Top, Bottom Times Bottom

  How to multiply fractions and mixed numbers, why the rule works using an area model, why the product can be smaller than what you started with, and how to cancel first.