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Lesson Plan

7. Splitting Rectangles to Solve Word Problems (A)

teaches Common Core State Standards 111.26.7.D
teaches Common Core State Standards 111.5.6.C
teaches Common Core State Standards 111.6.5.D
teaches Common Core State Standards CCSS.Math.Content.3.MD.C.7c
teaches Common Core State Standards CCSS.Math.Practice.MP7
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Lesson objective: Apply the distributive property to real-world area problems.

This lesson provides an opportunity for students to apply their knowledge and understanding of the distributive property to a real-life situation. Students are asked to design a bulletin board which needs to be split, and the area needs to be found for the smaller rectangles as well as the whole bulletin board.

Key Concept students will use: 

  • The area of a rectangle with whole-number side lengths a and b + c is the sum of a x b and a x c.

Skills students will use:

  • Using the distributive property
  • Multiplication
  • Solving for area

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they use the area model to decompose rectangles while using the distributive property to find the area the whole rectangle.

Key vocabulary: 

  • area
  • multiply


Related content

Appears in

Developing strategies for multiplication and division

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