Addition Worksheet

Solve.

1 a. _________ + 90 + 90 = 260
1 b. 30 + ______ + 20 = 140
2 a. ______ + 40 + 30 = 140
2 b. 50 + 80 + ______ = 140
3 a. 60 + 90 + ______ = 230
3 b. 20 + 30 + ______ = 80
4 a. 80 + _________ + 30 = 140
4 b. ______ + 60 + 20 = 110
5 a. 50 + 20 + ______ = 120
5 b. 60 + 80 + ______ = 190
6 a. ______ + 90 + 60 = 190
6 b. ______ + 10 + 70 = 110
7 a. 80 + ______ + 70 = 190
7 b. 10 + 40 + ______ = 110
8 a. 40 + 80 + ______ = 140
8 b. 70 + ______ + 40 = 200
Page 2

Answer Key

1 a. 80    
1 b. 90    
2 a. 70    
2 b. 10    
3 a. 80    
3 b. 30    
4 a. 30    
4 b. 30    
5 a. 50    
5 b. 50    
6 a. 40    
6 b. 30    
7 a. 40    
7 b. 60    
8 a. 20    
8 b. 90    


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