In previous lessons, students learned that whole numbers can be represented by tick marks and points on the number line. They learned that numbers farther to the right on a number line are greater than those to the left.
In this lesson, students build on that understanding to connect representations that use an arrow to show moving from one number to another on the number line (“jumps”) to the operations of addition and subtraction. Students match equations and number line representations and explain how they know they match (MP2, MP7).
- Recognize that on a number line, jumps to the right represent addition and jumps to the left represent subtraction.
- Let’s match equations to number line representations.
|Activity 1||15 min|
|Activity 2||20 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
- Number Puzzles: Addition and Subtraction (1–4), Stage 4: Within 100 with Composing (Addressing)
- Number Line Scoot (2–3), Stage 1: Twos, Fives, and Tens (Addressing)