Lesson 1

Factor Games

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Task

  1. 1404
  2. 400
  3. 364
  4. 129
  5. Possible response:
    25 × 10 = 250
    25 × 4 = 100

    250 + 100 = 350 is a good estimate.

Remind students to use efficient methods. Note that Question B can be solved using mental math.

B. Multiplication and Division

Solve each of the following problems using paper and pencil or mental math. Estimate to be sure your answers are reasonable. Use the Multidigit Multiplication Strategies Menu in the Student Guide Reference section.

  1. 234 × 6 =
  2. 24,000 ÷ 60 =
  3. 26 × 14 =
  4. 903 ÷ 7 =
  1. Explain your estimation strategy for Question C.