Addition Worksheet

Solve.

1 a. _________ + 90 + 90 = 220
1 b. 20 + _________ + 40 = 150
2 a. 50 + 60 + _________ = 180
2 b. ______ + 10 + 50 = 100
3 a. 40 + ______ + 10 = 140
3 b. 80 + ______ + 30 = 140
4 a. 20 + ______ + 50 = 120
4 b. 80 + 80 + _________ = 180
5 a. 90 + 60 + ______ = 180
5 b. 30 + 20 + ______ = 90
6 a. 40 + 20 + ______ = 70
6 b. 10 + 60 + ______ = 120
7 a. 40 + 20 + ______ = 100
7 b. 10 + ______ + 20 = 60
8 a. 20 + 40 + ______ = 140
8 b. 50 + _________ + 70 = 210
Page 2

Answer Key

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


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