Walking the Number Line: Sums of Rational Numbers & Opposites
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Students will be able to find the sum of rational numbers (integers, fractions, and decimals) using number line models and the concept of opposites, and explain why a number and its opposite sum to zero (7.NS.1a, 7.NS.1b).
Lesson Overview
Students progress from locating integers on a number line to adding rational numbers (fractions and decimals) using number line models and the concept of opposites, building toward multi-step sums with mixed signs.
Materials
- Vertical whiteboards or chart paper
- Dry-erase markers (multiple colors)
- Erasers or socks
- Printed number line reference strips (optional)
- Four-quadrant consolidation note sheets (printed)
- Mild/Medium/Spicy practice cards
Scaffolded Task Progression
Write an addition equation that matches your move.
Write an addition equation that matches your move.
Write one addition equation for the full trip. What do you notice?
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