Show:
Addition
Subtraction
Addition
Subtraction
+ and -
100

10+20+2

32

100

20-10-2

8

100

10+20

30

100

20-10-2

8

100

10+10-1

19

200

15+20+2

37

200

15-10-2

3

200

15+10+2

27

200

21-10-2

9

200

10+20-10

10

300

17+10+10+2

39

300

20-10-3

7

300

26+20+10+10

66

300

35-20-10

5

300

16+10-10+2

14

400

32+20+2

54

400

34-20-10

4

400

23+20+10+2

55

400

45-20-10-2

13

400

35-10+20

45

500

24+10+20+2

56

500

51-30-10-3

9

500

25+20+10+2

52

500

53-20-10-2

21

500

45+10+20-2

73