Adding Groups of 10
Adding Tens on a Hundred Chart
Adding Tens to Two-Digit Numbers
Using Mental Math to Add Tens
Adding to a Two-Digit Number
100

3 tens + 4 tens = 

7 tens

100

2 + 10 = 

12

100

14 + 20 =

34

100

25 + 30 =

55

100

17 + 9 =

26

200

2 tens + 6 tens =

8 tens

200

6 + 30 =

36

200

27 + 50 = 

77

200

58 +20 =

78

200

29 + 6 =

35

300

4 tens + 1 ten =

5 tens

300

37 + 10 =

47

300

40 + 40 =

80

300

72 + 10 =

82

300

47 + 5 =

52

400

20 + 30 =

50

400

53 + 20 =

73

400

17 + 50 =

67

400

22 + 40 =

62

400

Jase caught 37 lightening bugs. Then he caught 3 more. How many lightening bugs does he have in all?

40 lightening bugs

500

40 + 50 =

90

500

63 + 30 = 

93

500

45 + 40 =

85

500

86 + 10 =

96

500

Layla has 22 dolls. For her birthday she got 6 more dolls. How many dolls does Layla have now?

28 dolls

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