Lesson 6

Sandwich Mass

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Use this DPP item to practice some multiplication and division facts using the properties of 0 and 1.

    1. 8
    2. undefined
    3. 0
    4. 1
    5. 12
    6. undefined
    7. 0
    8. 1
  2. There is no number that makes ? × 0 = 4 true. Yet, 9 × 0 = 0 is true.

R. Zeros and Ones

    1. 8 × 1 = __________
    2. 4 ÷ 0 = __________
    3. 0 ÷ 9 = __________
    4. 1 ÷ 1 = __________
    5. 12 ÷ 1 = __________
    6. 5 ÷ 0 = __________
    7. 7 × 0 = __________
    8. 3 ÷ 3 = __________
  2. Justify your reasoning for Questions 1B and 1C using a related multiplication sentence.