Lesson 4

Compact Multiplication Revisited

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Refer students to the Multiplication Strategies Menu for Larger Numbers and the Multidigit Multiplication Strategies Menu in the Student Guide Reference section.

    1. 1220

    2. 253

    3. 2312

    4. 1176

  2. Possible response 1A:
    10 × 244 = 2440
    2440 ÷ 2 = 1220

    Possible response 1D:
    100 × 12 = 1200
    1200 – 24 = 1176

N. More Multiplication

  1. Solve each of the following using a paper-and-pencil method or mental math. Estimate to see if your answers are reasonable.
    1. 244 × 5 =
    2. 23 × 11 =
    3. 34 × 68 =
    4. 98 × 12 =
  2. Choose a problem in Question 1 and show how you can solve it using mental math.