Show:
1 Addition
2 Addiiton
3 Addition
2 Subtraction
3 Subtraction
100

1 + 0 =

1

100

10 + 11 =

21

100

200 + 002

402

100

12 - 12 =

0

100

103 - 102 =

1

200

2 + 4 =

6

200

15 + 14 =

29

200

298 + 127 =

425

200

23 - 12 =

11

200

245 - 176 =

69

300

7 + 7 =

14

300

21 + 12

33

300

482 + 278 =

760

300

35 - 32 =

3

300

497 - 423 =

74

400

9 + 6 =

11

400

45 + 65

110

400

399 + 536 = 

935

400

55 - 43 =

12

400

655 - 556 =

99

500

8 + 6 =

14

500

88 + 77 =

165

500

766 + 700 =

1, 466

500

78 - 29 =

49

500

888 - 632 =

256