Show:
Adding 10s
Adding within 100
Adding within 100
Adding within 100 regroup
Challenge round
100

20+10=

30

100

10+12=

22

100

12+56=

68

100

12+8

20

100

100+200=

300

200

52+20=

72

200

25+25=

50

200

22+32=

54

200

38+24=

62

200

125+113=

238

300

29+30=

59

300

42+23=

65

300

34+61=

95

300

54+23=

77

300

234+522=

756

400

64+50=

114

400

64+21=

85


400

26+61=

87

400

92+25=

117

400

348+475=

823

500

75+80=

155

500

34+43=

77

500

64+36=

100

500

81+64=

145

500

478+457=

935