No Groups of ten
Group of ten 1's
Group of ten 10's
Group of ten 1's and 10's
Mystery Problems
100

60 + 30

90

100

28 + 14

42

100

53 + 54

107

100

55 + 68

123

100

70 + 80

150

200

32 + 50

82

200

45 + 37

82

200

78 + 40

118

200

68 + 84

152

200

34 + 52

86

300

43 + 16

59

300

59 + 26

85

300

46 + 81

127

300

39 + 71

110

300

76 + 52

128

400

64 + 25 

89

400

77 + 17

94

400

92 + 43

135

400

87 + 79

166

400

48 + 39

87

500

52 + 47

99

500

64 + 29

93

500

82 + 95

177

500

97 + 98

195

500

99 + 99

198

M
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