addition
subtraction
addition
subtraction
addition
100

10+4

14
100

10-2

8

100

5+3

8

100

3+7

10

100

9+1

10


200

10+10

20

200

13-3

10

200

15+3

18

200

15-3

12

200

11+7

18

300

10+13

23

300

22-8

14

300

23+11

34

300

31-4

27

300

24+7

31

400

45+6

51

400

54-8

46

400

43+9

52

400

52-8

44

400

41+13

54

500

67+11

78

500

79-13

66

500

80+23

103

500

76-12

64

500

65+6

71