Lesson 4

Every Number Has Its Place

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

Use DPP item P to practice addition strategies in Group F and the related subtraction facts. Have connecting cubes and number lines readily available.

  1. 16 − 9 =  7; 9 +  7 = 16
    16 − 7 = 9
  2. 17 − 8 =  9; 8 +  9 = 17
    17 − 9 = 8
  3. 4 + 10 = 14; 14 −  4 = 10
    14 − 10 = 4
  4. 18 − 9 = 9

Ongoing Assessment

Use DPP item P to assess students' abilities to determine the unknown number in an addition or subtraction sentence relating three whole numbers for the facts in Group F [E15].

P. Fact Families

Complete each fact family. Write the missing number sentence.

  1. 7 + 9 = 16
    9 + = 16
  2. 9 + 8 = 17
    8 + = 17
  3. 10 + 4 = 14
    14 − = 10
  4. 9 + 9 = 18
  1. 16 − 9 =
    ________________
  2. 17 − 8 =
    ________________
  3. 4 + 10 =
    ________________
  4. ________________