Show:
1 Digit Addition
2 Digit Addition
3 Digit Addition
Rounding to Nearest 10
Rounding to Nearest 100
100

1+3

4

100

10+14

24

100

111+222

333

100

9

10

100

45

0

200

2+4

6

200

25+15

40

200

358+434

792

200

34

30

200

162

200

300

6+3

9

300

67+54

121

300

132+763

895

300

335

330

300

350

400

400

8+9

17

400

73+89

162

400

631+189

820

400

978

980

400

655

700

500

8+6

14

500

99+32

131

500

568+219

787

500

1281

1280

500

1431

1400