3rd Grade Unit 3 Addition and Rounding

1 Digit Addition

100

1+3

4

200

2+4

6

300

6+3

9

400

8+9

17

500

8+6

14

2 Digit Addition

100

10+14

24

200

25+15

40

300

67+54

121

400

73+89

162

500

99+32

131

3 Digit Addition

100

111+222

333

200

358+434

792

300

132+763

895

400

631+189

820

500

568+219

787

Rounding to Nearest 10

100

9

10

200

34

30

300

335

330

400

978

980

500

1281

1280

Rounding to Nearest 100

100

45

0

200

162

200

300

350

400

400

655

700

500

1431

1400