+9
Bridge to 10
Doubles
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What is the number?
100

10+9

19

100

12+7

19

100

10+10

20

100

10, 20, 30, ___, 50, 60

40

100

Five hundred seventy eight

578

200

21+9

30

200

27+5

32

200

6+6

12

200

5, 10, 15, 20, 25, ___, 35, 40

30

200

100 + 20 + 5

125

300

75+9

84

300

66+8

74

300

7+7

14

300

14, 16, 18, ___, 22, 24

20

300

800 + 90 + 9

899

400

118+9

127

400

119+9

128

400
8+8

16

400

36, 46, ___, 66, 76

56

400

2 hundreds, 3 tens, 4 ones

234

500

225+9

234

500

876+9

885

500

9+9

18

500

___, 118, 128, 138, 148

108

500

6 hundreds, 5 tens, 4 ones

654