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Easy Addition
Easy Subtraction
Harder Addition
Harder Subtraction
Harder Mixed
100

3 + 48 = ???

 3 + 48 = 51

100

20 - 8 = ???

20 - 8 = 12

100

20 + 28 = ??? 

20 + 28 = 48 

100

48 - 18 = ???

48 - 18 = 30

100

28 + 28 = ???

28 + 28 = 56

200

5 + 35 = ???

5 + 35 = 40

200

38 - 9 = ???

38 - 9 = 29

200

48 + 22 = ???

48 + 22 = 70

200

56 - 22 = ???

56 - 22 = 28

200

90 - 23 = ???

90 - 23 = 67

300

8 + 29 = ???

8 + 29 = 37

300

48 - 8 = ???

48 -8 = 40

300

90 + 21 = ???

90 + 21 = 111

300

28 - 13 = ???

28 - 13 = 15

300

90 + 23 = ???

90 + 23 = 113

400

34 + 9 = ???

34 + 9 = 43

400

80 - 10 = ???

80 - 10 = 70

400

81 + 19 = ???

81 + 19 = 100

400

100 - 50 = ???

100 - 50 = 50 

400

50 - 29 = ???

50 - 29 = 21

500

10 + 130 = ???

10 + 130 = 140

500

84 - 10 = ???

84 - 10 = 74
500

94 + 20 = ???

94 + 20 = 114

500

85 - 30 = ???

85 - 30 = 55

500

58 + 28 = ??? 

58 + 28 = 86