Lesson 4

Addition

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

This DPP item practices the fact families for the multiplication facts for the 9s.

Ask students what strategies they use to solve these problems.

  1. 27; 3 × 9 = 27; 27 ÷ 9 = 3;
    27 ÷ 3 = 9
  2. 18; 2 × 9 = 18; 18 ÷ 9 = 2;
    18 ÷ 2 = 9
  3. 7; 63 ÷ 7 = 9; 7 × 9 = 63;
    9 × 7 = 63
  4. 72; 9 × 8 = 72; 72 ÷ 9 = 8; 72 ÷ 8 = 9
  5. 9; 9 × 9 = 81
  6. 36; 4 × 9 = 36; 36 ÷ 4 = 9;
    36 ÷ 9 = 4
  7. 90; 9 × 10 = 90; 90 ÷ 9 = 10;
    90 ÷ 10 = 9
  8. 6; 54 ÷ 6 = 9; 6 × 9 = 54;
    9 × 6 = 54
  9. 45; 9 × 5 = 45; 45 ÷ 9 = 5;
    45 ÷ 5 = 9

O. Nines Are Fine

Do these problems in your head. Write the answers and then write the other number sentences in the same fact family.

  1. 9 × 3 =
  2. 9 × 2 =
  3. 63 ÷ 9 =
  4. 8 × 9 =
  5. 81 ÷ 9 =
  6. 9 × 4 =
  7. 10 × 9 =
  8. 54 ÷ 9 =
  9. 5 × 9 =