- #1
+ #1
- #2
+ #2
- #3
100

2 - 6 = x 

x = 4

100

2+9=x

x = 11

100

3-14=x

x = 11

100

12+ 19=x

x = 31

100

12- 22=x

x = 10

200

19 - x = 10

x = 29

200

9 + x = 14

x = 5

200

27 - x = 16

x = 43

200

x + 98 =129

x = 31

200

51- x = 32

x = 83

300

32 - x = 41

x = 73

300

19 + x = 27 

x = 8

300

24 - x =  24

x = 48 

300

77 + x = 90

x = 13

300

30 - x = 20

x = 50

400

15 - x  = 23 

x = 38

400

14 + x = 32

x= 18

400

90 - x = 27

x = 117

400

54 + x = 76

x = 22

400

92 - x = 27

x = 119

500

50 - x = 236 

x = 286

500

x + 46 = 89

x = 43

500

87 - x  = 64

x = 151

500

11 + x = 182

x = 171

500

400 - x = 258

x = 658

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