Decade numbers
Count on
Find the sum
Word problems
100

50 + 6

56

100

78 + 4

82

100

what is the sum of 64 and 6

70

100

You have 18 toy cars. Your friend has 5 toy cars. How many toy cars do you have in all?

18 + 5 = 

23

200

40 + 3

43

200

56 + 4

60

200

what is the sum of 60 and 2

62

200

I have 37 stickers. I find 6 more stickers. How many stickers do I have now?

37 + 6 =

 43

300

90 + 5

95

300

72 + 9

81

300

what is the sum of 15 + 6

21

300

There are 34 bikes at the park. 8 more bikes join. How many bikes are there now?

34 + 8 = 

42

400

10 + 7

17

400

65 + 5

70

400

what is the sum of 32 and 9

41

400

You see 47 birds and 5 turtles at the zoo. How many animals do you see altogether? 

47 + 5 = 

52

500

60 + 4

64

500

91 + 5

96

500

what is the sum of 48 and 3

51

500

There are 76 ornaments on the tree. You add 4 more. How many ornaments are there now?

76 + 4 =

80