Topic 8 Review

Properties of Addition

100

Name the property: 24+0=24

Identity Property of Addition

200

Name the property: (12+12)+24=12+ (12+24)

Associative Property of Additon

300

Name the property: 25+45=45+25

Commutative Property of Addition

400

Name the property and fill in the missing number: (13+26)+17=13+(___+17)

Associative Property of Addition; 26

500

Name the Property and fill in the missing number: 12+16+18=18+12+___

Commutative Property of Addition; 16

Round to the nearest 10

100

37

40

200

55

60

300

163

160

400

98

100

500

1,484

1,480

Round to the nearest 100

100

563

600

200

850

900

300

555

600

400

999

1,000

500

4,372

4,400

Estimate the sum

100

Estimate the sum to the nearest 100: 348+568=

300+600=900

200

Estimate the sum to the nearest 10: 36+42=

40+40=80

300

Estimate the sum to the nearest 10: 345+651=

350+650= 1,000

400

Estimate the sum to the nearest 100: 493+371=

500+400=900

500

Estimate the sum to the nearest 10: 1,234+3,567=

1,230+3,570=4,800

Estimate the difference

100

Estimate the difference to the nearest 10: 94-35=

90-40=50

200

Estimate the difference to the nearest 100: 763-429=

800-400=400

300

Estimate the difference to the nearest 10: 645-299=

650-300= 350

400

Estimate the difference to the nearest 10: 542-378=

540-380=160

500

Estimate the difference to the nearest 100: 5,321-3,281=

5,300-3,300=2,000