Lesson 6

Using Estimation

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

  1. 35
    35 ÷ 7 = 5    		 35
    35 ÷ 5 = 7
  2. 30
    30 ÷ 10 = 3    		 30
    30 ÷ 3 = 10
  3. 5
    5 × 9 = 45    		 5
    9 × 5 = 45
  4. 70
    70 ÷ 7 = 10    		 70
    70 ÷ 10 = 7
  5. 40
    40 ÷ 8 = 5    		 40
    40 ÷ 5 = 8
  6. 9
    9 × 10 = 90    		 9
    10 × 0 = 90

Ongoing Assessment

Use DPP Bit S to assess students' abilities to determine the number in a multiplication or division sentence relating three whole numbers for the 5s and 10s [E11].

See the Letter Home for targeted practice ideas.

S. Fact Family Quiz: 5s and 10s

Solve each pair of related facts. Then name two other facts in the same fact family.

  1. 5 × 7 = 7 × 5 =
  2. 10 × 3 = 3 × 10 =
  3. 45 ÷ 9 = 45 ÷ 5 =
  4. 10 × 7 = 7 × 10 =
  5. 5 × 8 = 8 × 5 =
  6. 90 ÷ 10 = 90 ÷ 9 =