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Addition
Subtraction
Multiplication
Division
Surprise Equation
100

4 + x =9

x=5

100

13 - x= 7

x=6

100

5 x y= 45

y=9

100

36 ÷ x= 6

x=6

100

50x 3= x

x=150

200

X + 8 = 13

x=5

200

20 - x = 8

x=12

200

y x 8= 24

y=3

200

40 ÷ x = 10 

x = 4

200

30 x 4= x

x= 120

300

13 + x = 20

x = 7

300

x - 9= 11

x= 20 

300

12 x y = 24

y=2

300

12 ÷ x = 3

x=4

300

40 x 6 = x

x= 240

400

40 + x = 66

x=26

400

x - 3= 47

x=50 

400

6x y= 42

y=7

400

72 ÷ x = 9

x=8

400

60 x 7= x

x= 420

500

16 + x= 25

x = 9 

500

x - 13= 40

x=53

500

9 x y= 81

y=9

500

64 ÷ x = 8

x=8

500

90 x 9=x

x=810