Add Tens
Subtract Tens
2-digt + 1-digit
Add 2-digit (no regrouping)
Add 2-digit (regrouping)
100
8+10

18

100

20-10

10

100

16+3

19

100

34+21

55

100

25+36

61

200

20+20

40

200

42-20

22

200

24+6

30

200

45+23

68

200

48+27

75

300

32+40

72

300

56-30

26

300

65+2

67

300

72+27

99

300

57+35

92

400

57+30

87

400

72-50

22

400

82+7

89

400

There are 31 fish. 54 more fish join them. How many fish are there now?

85 fish

400

62+37

99

500

45+50

95

500

99-80

19

500

I have 43 stickers.  Sara gave me 6 more stickers.  How many stickers do I have in all?

49 stickers

500

There are 32 puppies in training.  24 more puppies join them.  How many puppies are in training? 

56 puppies

500

There 46 strawberries and 28 blueberries. How many berries in all?

74 berries

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