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Addition
Subtraction
Multiplication
Division
Mystery
100

 n + 2 = 16

14

100

12=x - 5

17

100

66=6y

11

100

z/6 =12

72

100

4x=16

4


200

 v + 3 = 11

8

200

20=r - 6

26

200

6d = 30

5

200

6=s/2

12

200

-1 + x = 30

31

300

f + 7 = 10

3
300

x - 40=34

74

300

6c = 24

-4

300

y/9=3

27

300

-5+x=22

27

400

56+x=100

44

400

x - 64=28

92

400

36 = 4r

9

400

14=a/2

28

400

-8 + x = 3

11

500

x + 136=203

67

500

x - 503=253

756

500

12x=96

8

500

r/5=60

300

500

x/4=5

20