Arrow Way
Decompose
Number Line
Make a Ten
100

18+7=

25

100

15+6=

21

100

24+6=

30

100

29+8=

37

200

24+30=

54

200

29+20=

49

200

35+40=

75

200

19+20=

39

300

46+48=

94

300

34+47=

81

300

57+29=

86

300

36+59=

95

400

78+78=

156

400

84+58=

142

400

87+57=

144

400

89+57=

146

500

145+28=

173

500

118+36=

154

500

123+45=

168

500

138+24=

162