Lesson 9

Money Problems

Est. Class Sessions: 1–2

Summarizing the Lesson

Display and direct students’ attention to the Math Practices page in the Student Activity Book Reference section. Explain to students that they will be answering some questions on the Money Problems pages in the Student Activity Book.

  • Good problem solvers choose good tools and strategies [MPE2]. What are some tools we have been using to solve money problems? (number lines, 200 Charts, coins, drawings)
  • You will solve each problem two ways. How does this help you? Which Math Practices Expectation am I thinking about? (You can see if your problem makes sense when you solve it a second time and if it doesn’t, you can try it again. MPE3, Check for reasonableness.)
  • You will need to show your work clearly so that others can understand your thinking [MPE5] and include labels so we know what your numbers mean [MPE6]. Look at the questions. What label do you think you will use? (cents)

Ask students to complete the Money Problems page. Have number lines, 200 Charts, and coins readily available.

Use the Money Problems page with the Feedback Box in the Student Activity Book to assess students’ abilities to: identify, describe, and use patterns on the 200 Chart and number line [E1]; connect representations of quantities using number lines, 200 Charts, and number sentences [E2]; represent subtraction using multiple representations (e.g., counters, drawings, number sentences, number lines, 200 Chart) [E3]; find a strategy to solve problems [MPE2]; check solutions for reasonableness [MPE3]; explain solution strategies [MPE5]; and use labels to show what numbers mean [MPE6].

To provide targeted practice with representing addition using number sentences, place copies of the Spin and Add pages from the Student Activity Book, and clear spinners or paper clips and pencils in a learning center so that students can play the game. Provide access to a collection of coins and number lines.

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