Test Objectives
• Demonstrate the ability to rewrite a sum using the commutative and associative properties
• Demonstrate the ability to identify the parts of an addition problem as addend or sum
• Demonstrate the ability to add using the identity property of zero

#1:

Instructions: Rewrite each using the commutative property.

a) 1 + 7

b) 2 + 4

c) 6 + 15

d) 13 + 12

#2:

Instructions: Rewrite each using the commutative property.

a) 21 + 1

b) 13 + 9

c) 51 + 7

d) 103 + 2

#3:

Instructions: Identify the parts of each addition problem.

a) 9 + 4 = 13

b) 12 + 10 = 22

c) 5 + 4 + 11 + 3 = 23

Instructions: Find each sum.

d) 37 + 0

e) 962 + 0

f) 1,362,373 + 0

#4:

Instructions: Rewrite each using the associative property.

a) (3 + 1) + 5

b) 17 + (11 + 2)

c) (9 + 2) + 1

#5:

Instructions: Rewrite each using the associative property.

a) (4 + 6) + 7

b) 13 + (2 + 8)

c) (10 + 20) + 15

Written Solutions:

#1:

Solutions:

a) 1 + 7 = 7 + 1

b) 2 + 4 = 4 + 2

c) 6 + 15 = 15 + 6

d) 13 + 12 = 12 + 13

#2:

Solutions:

a) 21 + 1 = 1 + 21

b) 13 + 9 = 9 + 13

c) 51 + 7 = 7 + 51

d) 103 + 2 = 2 + 103

#3:

Solutions:

d) 37 + 0 = 37

e) 962 + 0 = 962

f) 1,362,373 + 0 = 1,362,373

#4:

Solutions:

a) (3 + 1) + 5 = 3 + (1 + 5)

b) 17 + (11 + 2) = (17 + 11) + 2

c) (9 + 2) + 1 = 9 + (2 + 1)

#5:

Solutions:

a) (4 + 6) + 7 = 4 + (6 + 7)

b) 13 + (2 + 8) = (13 + 2) + 8

c) (10 + 20) + 15 = 10 + (20 + 15)