Random
Addition Patterns
Adding mentally
Rounding
Addition Properties
100

Symbols which show grouping of numbers.

Parenthesis

100

10 more than 310

320

100
54+23=

77

100

45;tens

50

100

Find each sum. Identify the property.

8+9 = 9+8

17; Commutative

200

Round each addend to its greatest place value and find the sum.

365+123=

500

200

100 more than 173

273

200

67+32=

99

200

86;tens

90

200

Find each sum. Identify the property.

(9+3) + 2=9+(2+3)

14;Associative

300

Which property of addition matches the definition. 

States that the way addends are grouped does not change the sum. 

Associative Property

300
Complete the number sentence.

974+____=975

1

300

234+161=

395

300

543;hundreds

500

300

Find each sum. Identify the property.

53+0=

0;Identity

400

Which property of addition matches the definition.

States that the order in which numbers are added does not change the sum.

Commutative Property. (Switcheroo Property)

400

Complete the number sentence.

8,264 + _____=9,264

1,000
400

112+136=

248

400

1,582;hundreds

1,600

400

Find each sum. Identify the property.

5+(6+3)=6+(3+5)

14;Associative

500

Round each addend to its greatest place value and find the sum.

37+21=

60

500

Complete the number sentence.

4,362+_____=4,372

10

500

747+121=

868

500

1,856;tens

1,860

500

Find each sum. Identify the property.

8+2=2+8

10;commutative