Lesson 7 Addition and Subtraction on the Number Line

    • Let’s match equations to number line representations.

Warm-up Notice and Wonder: Jumps on the Number Line

What do you notice? What do you wonder?

Number line.
Number line. Scale, 0 to 15, by 1's. Arrow from 12 to 8.

Activity 1 Add and Subtract

Number line labeled from 0 to 10 with frog jumping from 9 to 2.

Circle the equation represented on the number line.

Problem 1

Circle the equation represented on the number line.

Number line. Scale 0 to 15 by 1's. Arrow from 10 to 15.

Problem 2

Number line. Scale 0 to 15 by 1's. Arrow from 13 to 5.

Problem 3

Number line. Scale 0 to 15 by 1's. Arrow from 12 to 2.

Problem 4

Circle the equation represented on the number line.

Number line. Scale 0 to 15 by 1's. Arrow from 4 to 14.

  2. Explain why the other equation doesn’t match this number line.

Activity 2 Number Lines and Equations

  1. Choose one of the equations.

  2. Write each equation next to the number line that represents it.

  3. Write the equation that didn’t have a match and represent it on a number line.

  1. Number line. Scale 0 to 20 by 1's. Arrow from 6 to 18.
  2. Number line. Scale 0 to 20 by 1's. Arrow from 10 to 3.
  3. Number line. Scale 0 to 20 by 1's. Arrow from 9 to 14.
  4. Number line. Scale 0 to 20 by 1's. Evenly spaced tick marks labeled with whole numbers. Arrow starts at 12, ends at 18.
  5. Number line. Scale 0 to 20 by 1's. Evenly spaced tick marks. Arrow from 3 to 20.
  6. Number line. Scale 0 to 20 by 1's. Arrow from 3 to 10. 
  7. Number line. Scale, 0 to 20, by 1's. Arrow from 20 to 17.
  8. Number Line. Scale 0 to 20, by 1’s. Evenly spaced tick marks.

Practice Problem

Problem 1

Which equation does the number line represent? Explain your reasoning.

Number line. Scale 0 to 15 by 1's. Evenly spaced tick marks. Arrow starts at 7, ends at 13.