Lesson 8

Assessing the Subtraction Facts

Est. Class Sessions: 1

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

    1. 7 + 9 = 16
    2. 9 + 7 = 16
    1. 16 − 9 = 7
    2. 16 − 7 = 9
    1. 9 + 5 = 14
    2. 14 − 5 = 9
    1. 5 + 9 = 14
    2. 14 − 9 = 5
    1. 9 + 2 = 11
    2. 2 + 9 = 11
    1. 11 − 2 = 9
    2. 11 − 9 = 2
    1. 8 + 9 = 17
    2. 9 + 8 = 17
    1. 17 − 8 = 9
    2. 17 − 9 = 8

Ongoing Assessment

Use DPP item AA to assess students' abilities to determine an unknown number in an addition or subtraction number sentence relating three whole numbers for the facts in Groups 1 and 2 [E7].

See the Letter Home for targeted practice ideas.

AA. Fact Families for Group 2

Complete the number sentences for each family.

    1. 7 + = 16
    2. + = 16
    3. 16 − =
    4. − 7 =
    1. 9 + = 14
    2. 14 − =
    3. + = 14
    4. − 9 =
    1. 9 + = 11
    2. + = 11
    3. 11 − =
    4. − 9 =
    1. 8 + = 17
    2. + = 17
    3. 17 − =
    4. − 9 =