3rd Grade Topic 8

Addition with Regrouping

100

136+43=

179

200

358+373=

731

300

395+427=

822

400

325+437+100=

862

500

243+132+158=

533

Subtraction with Regrouping

100

656-127=

529

200

153-37=

116

300

959-415=

544

400

490-255=

235

500

800-325=

475

Rounding Sums

100

Round to the nearest hundred then add.

175+126=

300

200

Round to the nearest hundred then add.

167+539=

700

300

Round to the nearest hundred then add.

274+443=

700

400

Round to the nearest ten then add.

218+466=

690

500

Round to the nearest ten then add.

563+289=

850

Rounding Differences

100

Round to the nearest hundred then subtract.

904-312=

600

200

Round to the nearest hundred then subtract.

725-278=

400

300

Round to the nearest ten then subtract.

146-118=

30

400

Round to the nearest ten then subtract.

851-242=

610

500

Round to the nearest ten then subtract.

351-106=

240

Properties of Addition

100

12+?=15+12

Name the Property: commutative, associative, or identity property of addition. 

15

Commutative Property of Addition

200

3+(7+8)= (3+?)+8

Name the Property: commutative, associative, or identity property of addition.

7

Associative Property of Addition

300

30+?=30

Name the Property: commutative, associative, or identity property of addition.

0

Identity Property of Addition

400

Use 78 and 34 to write an equation that shows the commutative property of addition. 

78+34=34+78

500

62+21+0=62+?

21