Addition Worksheet

Solve.

1 a. ______ + 10 + 50 = 130
1 b. ______ + 40 + 30 = 100
2 a. _________ + 40 + 50 = 160
2 b. 20 + 10 + ______ = 80
3 a. 50 + ______ + 30 = 120
3 b. 40 + 30 + ______ = 90
4 a. ______ + 10 + 50 = 140
4 b. 10 + 40 + ______ = 90
5 a. 50 + 40 + _________ = 180
5 b. ______ + 70 + 50 = 150
6 a. ______ + 50 + 60 = 130
6 b. 80 + 50 + ______ = 220
7 a. ______ + 20 + 10 = 80
7 b. 80 + 70 + _________ = 210
8 a. ______ + 30 + 40 = 150
8 b. 10 + 30 + ______ = 110
Page 2

Answer Key

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


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