Addition Worksheet 1

1 a.   

______ + 10 = 100

1 b.   

20 + ______ = 30

2 a.   

90 + ______ = 160

2 b.   

______ + 90 = 170

3 a.   

30 + ______ = 60

3 b.   

30 + ______ = 90

4 a.   

80 + ______ = 100

4 b.   

10 + ______ = 40

5 a.   

______ + 70 = 160

5 b.   

70 + ______ = 120

6 a.   

______ + 40 = 120

6 b.   

______ + 20 = 40

7 a.   

50 + ______ = 80

7 b.   

50 + ______ = 120

8 a.   

______ + 90 = 160

8 b.   

50 + ______ = 90

9 a.   

______ + 80 = 130

9 b.   

60 + ______ = 110

10 a.   

90 + ______ = 110

10 b.   

______ + 20 = 50

 

Answer Key

 

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