Lesson 10 Complete Equations

    • Let’s write equations to show numbers 11–19.

Warm-up What Do You Know About …?

What do you know about 15?

Activity 1 What Is Missing?

  1. Ten frame, full. 8 counters below.

  2. Ten frame, full. 3 counters below.

  3. Ten frame, full. 4 counters below.

  4. Ten frame, full. 6 counters below.

  5. Ten frame, full. 9 counters below.

  6. Ten frame, full. 2 counters below.

Activity 2 Make the Equations True

Students working together.

Find the numbers that make each equation true. You can use objects, drawings, or 10-frames to help you.

Activity 3 Centers: Choice Time

Choose a center.


Center. Bingo.

Number Race

Center. Number Race.

Grab and Count

Make or Break Apart Numbers

Center activity. Make or break apart numbers.

Tower Build

Center activity. Tower Build.

Practice Problem

Problem 1

Fill in the blanks to make each equation true.