Adding by tens place
No regrouping
Regrouping
Doubles
100

20+12

32

100

14+12

26

100

11+19

30

100

10+10

20

200

30+59

89

200

21+37

58

200

28+16

44

200

30+30

60

300

60+38

98

300

45+33

78

300

37+44

81

300

40+40

80

400

80+42

122

400

84+15

99

400

49+53

102

400

50+50

100

500

110+56

166

500

112+34

146

500

67+55

122

500

80+80

160

M
e
n
u