Lesson 9 Expressions and Equations

    • Let’s show numbers 11–19 in different ways.

Warm-up Choral Count: Recording to 19

What patterns do you see?

Activity 1 Organize Expressions and Numbers

Work with your group to organize the cards in a way that makes sense to you.

Activity 2 Equations and 10-frames

Draw a line from each equation to the dots it matches.

  1. Ten frame, full. 4 counters below.
  2. Ten frame full. One counter below.
  3. Ten frame, full. 2 counters below.
  4. Ten frame full. 9 counters below.
  5. Ten frame, full. 8 counters below.
  6. Ten frame, full. 5 counters below.

Activity 3 Introduce Make or Break Apart Numbers, Numbers 11–19

Choose a center.

Bingo

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

Choose an expression that matches the dots.

Ten frame, full. Below, 7 counters.

Explain how the expression matches the dots.