Lesson Plan

The Relationship of Multiplication and Addition

Curated and Reviewed by Lesson Planet

You know 4 + 4 + 4 = 3(4), but what about x + x + x? Pairs work together to develop equivalent expressions relating multiplication and addition in the third lesson of a 36-part series. They extend their knowledge of multiplication as repeated addition to variables in order to create identities like x + x + x = 3x.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Have pupils work in the same pairs as in previous lessons
Classroom Considerations
  • Learners should already have some familiarity with multiplication as repeated addition from earlier grades
  • Each group needs 30 paper square cut-outs for tape diagrams
Pros
  • Diagrams promote understanding of the process
  • Provides detailed timing suggestions
Cons
  • None
Common Core