Lesson 9 Compare Story Problems

    • Let’s solve story problems and write equations.

Warm-up Number Talk: Addition and Subtraction Expressions

Find the value of each expression mentally.

Activity 1 Solve and Represent Story Problems

Lizard.

  1. Han has 5 lizards.
    He has 3 snakes.
    How many pets does he have?

    Show your thinking using drawings, numbers, or words.

    Equation:

  2. Han has 8 pets.
    5 of his pets are lizards.
    Some of his pets are snakes.
    How many snakes does Han have?
    Show your thinking using drawings, numbers, or words.

    Equation:

  3. Han has an aquarium that can hold 8 pets.
    He has lizards and snakes.
    Show different ways Han could fill his aquarium.
    Show your thinking using drawings, numbers, or words.

    Equation:

Activity 2 Gallery Walk: Compare the Story Problems

As you look at your classmates’ work, think about the questions and be prepared to share your answers.

  1. What is the same about the story problems and representations?

  2. What is different about the story problems and representations?

  3. Explain how the equation matches the story problem.

Practice Problem

Problem 1

  1. There are 9 beads on the bracelet.
    2 of them are pink and the rest are green.
    How many green beads are on the bracelet?
    Show your thinking using drawings, numbers, or words.
    Equation:

  2. There are 9 beads on the bracelet.
    Some are pink and the rest are green.
    How many pink and green beads could there be on the bracelet?
    Show your thinking using drawings, numbers, or words.

    Equation: