Lesson 6

Using Multiplication Strategies

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Refer students to the Multiplication Strategies Menu in the Student Guide Reference section.

    1. 240
    2. 704
    3. 325
    4. 216
    5. 135
    6. 518
  2. Strategies will vary. Possible strategy: since 60 × 5 = 300 and 70 × 5 = 350, then the answer is between 300 and 350.
  3. Methods will vary. Possible mental strategy for 48 × 5: (50 × 5) − (2 × 5) = 250 − 10 = 240.

T. Multiplication Practice

Solve the following problems using paper and pencil or mental math. Choose at least one problem to solve using mental math and show how you solved it. Estimate to make sure your answers are reasonable.

    1. 48 × 5 =
    2. 88 × 8 =
    3. 65 × 5 =
    4. 54 × 4 =
    5. 27 × 5 =
    6. 74 × 7 =
  2. Show or tell your estimation strategy for Question 1C.
  3. Choose one problem and show how you can solve it using a different method than what you used before.