Lesson 6

Workshop: Factors, Multiples, and Primes

Est. Class Sessions: 1–2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

This DPP item practices some of the fact families for the multiplication facts for the 5s and 10s.

  1. 5 × 10 = 50, 50 ÷ 5 = 10,
    50 ÷ 10 = 5, 10 × 5 = 50
  2. 7 × 5 = 35, 35 ÷ 7 = 5,
    35 ÷ 5 = 7, 5 × 7 = 35
  3. 3 × 10 = 30, 30 ÷ 3 = 10,
    30 ÷ 10 = 3, 3 × 10 = 30
  4. 80 ÷ 8 = 10, 10 × 8 = 80,
    80 ÷ 10 = 8, 8 × 10 = 80
  5. 20 ÷ 5 = 4, 4 × 5 = 20,
    5 × 4 = 20, 20 ÷ 4 = 5
  6. 10 × 9 = 90, 90 ÷ 9 = 10,
    90 ÷ 10 = 9, 9 × 10 = 90

S. Working with Fact Families for × and ÷

Solve the problems below and complete the number sentences for the related facts.

  1. 5 × 10 = ______

    ______ ÷ 5 = ______

    ______ ÷ 10 = ______

    ______ × 5 = ______

  2. 7 × 5 = ______

    ______ ÷ 7 = ______

    ______ ÷ 5 = ______

    ______ × 7 = ______

  3. 3 × 10 = ______

    ______ ÷ 3 = ______

    ______ ÷ 10 = ______

    ______ × 10 = ______

  4. 80 ÷ 8 = ______

    ______ × 8 = ______

    80 ÷ ______ = ______

    8 × ______ = ______

  5. 20 ÷ 5 = ______

    ______ × 5 = ______

    5 × ______ = ______

    20 ÷ ______ = ______

  6. 10 × 9 = ______

    ______ ÷ 9 = ______

    ______ ÷ ______ = 9

    9 × ______ = ______