Addition without regrouping
Addition with regrouping
Subtraction without borrowing
Subtraction with borrowing
100

111 + 9

118

100

97 + 14

111

100

58 - 23

35

100

83 - 59

24

200

56 + 32

88

200

57 + 63

120

200

86 - 52

34
200

77 - 38

39

300

76 + 21

97

300

39 + 63

102

300

113 - 51

62

300

46 - 27

19

400

83 + 26

109

400

25 + 76

101

400

47 - 32

15

400

120 - 93

27

500

28 + 91

100

500

99 + 17

116

500

72 - 41

31

500

113 - 27

86