Show:
Adding 10s
Subtracting 10s
Adding without Regrouping
Adding with Regrouping
Challenge Time!
100

24+10=

34

100

34-10=

24

100
26+2=

28

100

34+36=

70

100

100+20=

120

200

65+10=

75

200

45-10=

35

200

32+34=

66

200

17+19=

36

200

103+7=

110

300

32+30=

62

300

50-20=

30

300

31+27=

58

300

56+18=

74

300

120-10=

110

400

57+40=

97

400

73-40=

33

400

62+5=

67

400

45+45=

90

400

100+36=

136

500

60+40=

100

500

100-60=

40

500

83+15=

98

500

53+29=

82

500

66+66=

132