Adding 10
Adding 20
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doubles
Facts
100

30 + 10 = 

40

100

30 + 20 = 

50

100

10 + 10 + 10 =

30

100
2 + 2
What is 4?
100
4 + 3
What is 7?
200

50 + 10 =

60

200

40 + 20 = 

60

200

25 + 10 + 10 =

45

200
4 + 4
What is 8?
200
9 + 2
What is 11?
300

45 + 10 = 

55

300

25 + 20 = 

45

300

35 + 10 + 10 + 10 =

65

300
8 + 8
What is 16?
300
7 + 3
What is 10?
400

67 + 10 = 

77

400

60 + 20 =

80

400

80 + 10 + 10 =

100

400
7 + 7
What is 14?
400
2 + 4
What is 6?
500

39 + 10 = 

49

500

55 + 20 = 

75

500

50 + 10 + 10 + 10 =

80

500
9 + 9
What is 18 ?
500
9 + 7
What is 16?
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