Understanding Addition of Integers

Count up or down to find sums. The third lesson in a 25-part series uses number lines to build the understanding of the sums of integers. Pupils make the connection between the distance and direction of a sum from the first addend, then express the connection both in words and with equations.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Create an addition matching activity to match equations, verbal descriptions, and number lines
  • Work to begin removing the reliance on the number line to make calculations and use it to confirm the calculations
Classroom Considerations
  • Requires the cards from the integer game
Pros
  • Demonstrates the position of sums on horizontal and vertical number lines
  • Contains suggestions for English language learners
Cons
  • None
Common Core