Lesson plan

6. Fluently subtract using different strategies (FP)

teaches Common Core State Standards CCSS.Math.Content.K.OA.A.2 http://corestandards.org/Math/Content/K/OA/A/2
teaches Common Core State Standards CCSS.Math.Content.K.OA.A.5 http://corestandards.org/Math/Content/K/OA/A/5
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8
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Lesson objective: Subtract using different strategies.

This lesson helps to build procedural skill with subtraction. Connecting cubes are used here because they support the students by serving as a concrete representation of subtraction as taking away and taking apart. This work develops students' understanding that subtraction can be thought of as taking away or taking apart.

Students engage in Mathematical Practice 1 (Make sense of problems and persevere in solving them) as they manipulate connecting cubes and practice with number bonds to solve problems in two different ways.

Key vocabulary:

  • number bond
  • number partners
  • take apart
  • take away

Special materials needed:

  • connecting cubes
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