Lesson 9 Multiplication as Equal Groups

    • Let’s work with equal groups of things.

Warm-up Number Talk: More Addition

Find the value of each expression mentally.

Activity 1 From Scaled Graphs to Equal Groups

Elena collected data about the kind of signs she saw on the way home. The data is shown in this picture graph:

Picture Graph. Signs I Saw on the Way Home. Key: each square represents 2 signs. stop signs, 2 squares. yield signs, 1 square. speed limit signs, 3 squares. street signs, 5 squares.

  1. Represent the number of speed limit signs Elena saw on the way home.

  2. Which statement describes the number of speed limit signs Elena saw? Explain your reasoning.

    1. There are 3 pictures and each picture represents 1 speed limit sign.

    2. There are 3 pictures and each picture represents 2 speed limit signs.

    3. There are 2 pictures and each picture represents 2 speed limit signs.

  3. How could this drawing represent the street signs Elena saw on the way home?

    Diagram. 5 groups of 2 dots.

Activity 2 Equal Group Situations

Represent each situation.

  1. There are 4 people wearing shoes. Each person is wearing 2 shoes.

  2. There are 2 boxes of markers. Each box has 10 markers.

  3. There are 3 basketball teams. Each team has 5 players.

Practice Problem

Problem 1

There are 6 tennis courts. There are 2 players on each tennis court.

Create a drawing or diagram to represent the tennis players. Then, find out how many players are on the tennis courts. Explain or show your reasoning.