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Lesson Plan

5. Add or subtract to find the missing addend (F)

teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Content.1.OA.C.6 http://corestandards.org/Math/Content/1/OA/C/6
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Lesson objective: Add or subtract to find the missing addend.

This lesson helps to build procedural skill with solving for the missing addend. A variety of strategies and tools are used here because they support student understanding. This work develops students' understanding that addition and subtraction are related.

Students engage in Mathematical Practice 2 (reason abstractly and quantitatively) as they solve for the missing addend.

Key vocabulary:

  • addend
  • decompose
  • make a ten
  • strategy
  • tool

Special materials needed:

  • student number lines (optional)
Related content

Appears in

Extending strategies for solving addition and subtraction problems

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