Addition Worksheet 1

1 a.   

 20 + ______ = 50

1 b.   

 60 + ______ = 100

2 a.   

 ______ + 60 = 100

2 b.   

 10 + ______ = 70

3 a.   

 ______ + 30 = 80

3 b.   

 50 + ______ = 130

4 a.   

 ______ + 90 = 140

4 b.   

 ______ + 90 = 180

5 a.   

 ______ + 50 = 120

5 b.   

 ______ + 10 = 70

6 a.   

 40 + ______ = 110

6 b.   

 80 + ______ = 90

7 a.   

 40 + ______ = 50

7 b.   

 ______ + 80 = 100

8 a.   

 50 + ______ = 60

8 b.   

 80 + ______ = 140

9 a.   

 ______ + 30 = 120

9 b.   

 30 + ______ = 90

10 a.   

 40 + ______ = 130

10 b.   

 ______ + 80 = 170

 

Answer Key

 

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