Common Core Alignment:.

3.MD.7b:

Measurement And Data

Geometric Measurement: Understand Concepts Of Area And Relate Area To Multiplication And To Addition.

Multiply side lengths to find areas of rectangles with whole- number side lengths in the context of solving real world and mathematical problems, and represent whole-number products as rectangular areas in mathematical reasoning.

3.MD.7d:

Measurement And Data

Geometric Measurement: Understand Concepts Of Area And Relate Area To Multiplication And To Addition.

Recognize area as additive. Find areas of rectilinear figures by decomposing them into non-overlapping rectangles and adding the areas of the non-overlapping parts, applying this technique to solve real world problems.

5.NF.4b:

Number And Operations - Fractions

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

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.