Show:
Addition within 100
Subtraction within100
Addition within 100 regrouping
Subtraction within 100 regrouping
Challenge Rounds!
100

23+43

65

100

56-14

42

100

45+27

72

100

83-38

45

100

56+45

101

200

92+12

104

200

45-13

32

200

78+22

100

200

91-47

44

200

89+15

104

300

65+20

85

300

98-47

51

300

52+39

91

300

76-31

45

300

78+56

134

400

78+10

88
400

76-24

52

400

23+46

69

400

61-26

35

400

67+76

143

500

45+44

99

500

87-56

31

500

12+76

88

500

72-18

54

500

99+99

198