Lesson 6

Division in Lizardland

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

  1. 18, 10,
    8, 18
  2. 8, 8,
    6, 8
  3. 9, 9
  4. 6, 13,
    13, 6
  5. 10, 5
  6. 9, 9,
    8, 9
  7. 15, 7,
    7, 15
  8. 3, 4,
    7, 7
  9. Since you double 5 to get 10 there are only two number sentences for this fact family.

Ongoing Assessment

Use DPP item S to assess students' abilities to identify the unknown number in an addition or subtraction sentence relating 3 whole numbers for Groups 7 and 8 [E11].

See Letter Home for targeted practice.

S. Fact Families: Groups 7 and 8

Solve each group of related facts.

    1. 10 + 8 =
    2. 18 − = 8
    3. + 10 = 18
    4. − 8 = 10
    1. + 6 = 14
    2. 14 − = 6
    3. 8 + = 14
    4. 14 − 6 =
    1. 9 + = 18
    2. 18 − = 9
    1. 7 + = 13
    2. − 7 = 6
    3. 7 + 6 =
    4. 13 − = 7
    1. 5 + 5 =
    2. 10 − 5 =
    1. 8 + = 17
    2. 17 − = 8
    3. + 9 = 17
    4. 17 − 8 =
    1. 7 + 8 =
    2. 15 − = 8
    3. 8 + = 15
    4. − 8 = 7
    1. 4 + = 7
    2. 7 − 3 =
    3. 3 + 4 =
    4. − 4 = 3
  9. Tell your neighbor why there are only two problems for the fact family in Question E.