Show:
1 digit addition
2 digit addition
3 digit addition
1 digit subtraction
2 digit subtraction
100

2 + 3 =

5

100

10 + 9 =

19

100

101 + 111

212

100

1 - 1 =

0

100
22 - 12 =

10

200

4 + 4 =

8

200

10 + 23 =

33

200

224 + 189

413

200

7 - 5 =

2

200

39 - 4 = 

35

300

7 + 5 =

12

300

21 + 12

33

300

300 + 003

303

300

5 - 2 =

3

300

47 - 39 =

8

400

8 + 6 =

14

400

42 + 67 =

109

400

450 + 122 =

572

400

8 -7 =

1

400

59 - 25 =

34

500

9 + 9 =

18

500

55 + 73 =

128

500

768 + 236 =

1,004

500

9 - 2 =

7

500

89 - 73 =

16