Show:
Addition 1
Addition 2
Subtraction 1
Subtraction 2
Add/Subtract
100

3 + 4

7
100

8 + 8

16

100
10 - 3

7

100

22 - 2

20

100

23 - 19

4

200

9 + 4

13

200

42 + 3

45

200

14 - 9

5

200

64 - 56

8
200

54 + 6

60

300

14 + 7

21

300

214 + 0

214

300

32 - 2

30
300

159 - 1

158

300

97 - 31

66

400

71 + 28

99
400

14 + 12

26

400

71 - 65

6
400

59 - 34

25

400

74 + 13

87

500

13 + 21

34

500

25 + 31

56

500

47 - 12

35

500
45 - 21

24

500

15 + 17

32