Count up or down to find sums. The third lesson plan in a 25-part series uses number lines to build an 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.

Concepts

number lines, addition integers, integers, negative integers, positive integers, absolute value, distance

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Additional Tags

math

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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

7.NS.A.1.b MP5