The Relationship of Addition and Subtraction

Add an outstanding resource to your repertoire. The first installment of a 36-part module looks at the relationship between addition and subtraction through an activity using tape diagrams. Pupils develop the identities w – x + x = w and w + x – x = w based on the results of the investigation.

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CCSS: Designed
Instructional Ideas

  • Assign the problem set as homework
Classroom Considerations

  • Prior preparation is necessary (cutting out squares)
  • Fluency exercise requires consulting the module overview page
Pros

  • Includes an exit ticket to assess learning
  • Lists questions to use during closing discussion
Cons

  • None
Common Core