Lesson 5

Representing Data with Line Plots

Est. Class Sessions: 1

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Encourage students to use the Addition and Subtraction Strategies Menus in the Student Guide Reference section to explore possible strategies for solving each problem.

  1. 144
  2. 277
  3. 189
  4. 652
  5. 2965
  6. 12,030
  1. Explanations will vary. Possible explanation: 783 is close to 800, and 594 is close to 600. 800 − 600 = 200. 189 is a reasonable answer.
  2. Answers will vary. Possible response for Question A: 65 + 80 = 145.
    80 is 1 more than 79, so 65 + 79 will be 1 less than 145 or 144.
    Possible response for Question F: Take 15 from 9045 and add it to 2985 to make 3000. 9030 + 3000 = 12,030.

V. Addition and Subtraction

Choose a strategy to solve each problem. Estimate to make sure your answers are reasonable. Use the Addition and Subtraction Strategies Menus in the Student Guide Reference section.

  1. 65 + 79 =
  2. 460 − 183 =
  3. 783 − 594 =
  4. 1089 − 437 =
  5. 2378 + 587 =
  6. 9045 + 2985 =
  1. Explain how you can use estimation to make sure your answer to Question C is reasonable.
  2. Choose one of these problems that you can solve using mental math. Explain what you do “in your head” or with a few quick notes.