LESSON 4.2
Name
Addition Properties
Vocabulary
Complete the sentences.
1.
2.
Associative
The
Property of
Addition states that the way addends are grouped does
not change the sum.
Commutative
The
Property of
Addition states that the numbers can be added in any
order and the sum will be the same.
Find the missing number, and tell which addition property you used.
3. 5 (2 1) (5 6. 45
)1
9 9 4. 72
18 7. 15
72
15
5.
8.
0 24
(4 ) (5 4)
Change the order or group the addends so that you can add them mentally.
Possible answers are given.
Find the sum. Tell which property you used.
Check students’ properties.
9. 22 14 8
10. (12 17) 3
11. 20 16 80
2 106
13.
25 (15 28)
14.
(145 290) 110
17.
340,112
© Harcourt
12. 4
Mixed Review
What is the value of the digit 4 in each number?
15.
84,250,000
4,000,000
16.
1,024
4
40,000
Practice
PW17
LESSON 4.2
Name
Addition Properties
Vocabulary
Complete the sentences.
1.
2.
Associative
The
Property of
Addition states that the way addends are grouped does
not change the sum.
Commutative
The
Property of
Addition states that the numbers can be added in any
order and the sum will be the same.
Find the missing number, and tell which addition property you used.
3. 5 (2 1) (5 )1
4. 72
2; Associative
6. 45
18 72
5.
18; Commutative
9 9 7. 15
45; Commutative
15
0 24
24; Identity
8.
0; Identity
(4 ) (5 4)
5; Commutative
Change the order or group the addends so that you can add them mentally.
Possible answers are given.
Find the sum. Tell which property you used.
Check students’ properties.
9. 22 14 8
10. (12 17) 3
11. 20 16 80
(22 8) 14; 44
12. 4
2 106
12 (17 3); 32
13.
© Harcourt
(4 106) 2; 112
25 (15 28)
(20 80) 16; 116
14.
(25 15) 28; 68
(145 290) 110
145 (290 110); 545
Mixed Review
What is the value of the digit 4 in each number?
15.
84,250,000
4,000,000
16.
1,024
4
17.
340,112
40,000
Practice
PW17