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Lesson Plan

9. Solve real world area problems using multiplication and addition (FP)

teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Content.3.OA.B.5 http://corestandards.org/Math/Content/3/OA/B/5
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Lesson objective: Solve real world area problems using multiplication and addition.

This lesson helps to build procedural skill with solving real world area problems. The area model is used here because it supports the connection between real world area problems and students' earlier work finding the area of a rectangle without a context. This work develops students' understanding that area relates to multiplication and addition and that knowledge can be used to solve real world problems involving area.

Students engage in Mathematical Practice 2 (reason abstractly and quantitatively) as they translate area problems written within a real world context into equations with unknown numbers to represent the problems.  Students will use models to connect the concept of area to real world problems and will write and solve multiplication, division, and addition problems within the context of real world problems.

Key vocabulary:

  • addition
  • area
  • equation
  • length
  • long
  • multiplication
  • square unit
  • unit
  • unknown
  • wide
  • width

Special materials needed:

  • grid paper
  • square tiles
Related content

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Solving problems involving area

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