Easy add
Easy sub
Tricky add
Tricky sub
100

2+2=

4
100

5-0=

5

100

23+17=

40

100

28-19=

9

200

1+3=

4

200

9-4=

5

200

30+20=

50

200

40-20=

20

300

10+10=

20
300

12-2=

10

300

37+44=

81

300

85-26=

59

400

22+44

66

400

34-11=

23

400

55+60=

115

400
60-34=

26

500

56+22=

78

500

65-24

41

500

78+56=

134

500

50-42=

8

M
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n
u