Addition Worksheet

Solve.

1 a. ______ + 90 + 40 = 150
1 b. ______ + 20 + 90 = 140
2 a. 50 + ______ + 70 = 130
2 b. ______ + 10 + 10 = 90
3 a. 10 + 30 + ______ = 110
3 b. 20 + ______ + 30 = 70
4 a. 30 + ______ + 90 = 140
4 b. _________ + 90 + 20 = 200
5 a. _________ + 80 + 50 = 180
5 b. 40 + ______ + 50 = 170
6 a. ______ + 40 + 60 = 130
6 b. 90 + 10 + _________ = 180
7 a. 80 + ______ + 40 = 140
7 b. 80 + ______ + 90 = 220
8 a. ______ + 90 + 30 = 160
8 b. 40 + ______ + 30 = 90
Page 2

Answer Key

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


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