Show:
Easy Addition
Hard Addition
Easy Subtraction
Hard Subtraction
100

12 + 2 = ____

14

100

45 + 45 = ____

90
100

12 - 2 = ____

10
100

45 - 45 = ____

0

200

14 + 6 = ____

20

200

56 + 34 = ____

90

200

28 - 6 = ____

22

200

76 - 22 = ____

54

300

20 + 3 = ____

23

300

102 + 20 = ____

122

300

14 - 8 = ____

6

300

94 - 32 = ____

62

400
11 + 9 = ____

20

400

85 + 94 = ____

179

400

76 - 6 = ____

70

400

120 - 118 = ____

2

500

42 + 2 = ____

44

500

203 + 254 = ____

457

500

98 - 9 = ____

89

500

276 - 122 = ____

154