Subtraction
Addition
Subtraction
Addition
+/-
100

9-9

0

100

2+9

11

100

9-1

8

100

9+5

14

100

9-5

4

200

11-9

2

200

15+9

24

200

13-9

4

200

10+9

19

200

9-6

3
300

14-9

5

300

19+9

28

300

26-9

17

300

18+9

27

300

13+9

22

400

15-9

6

400

23+9

32

400

25-9

16

400

25+9

34

400

27+9

36

500

17-9

8

500

21+9

30

500

16-9

7

500

17+9

26

500

30-9

21

M
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n
u