Addition Worksheet

Solve.

1 a. 20 + _________ + 80 = 130
1 b. _________ + 50 + 40 = 160
2 a. 90 + 60 + _________ = 210
2 b. 80 + ______ + 50 = 160
3 a. 30 + ______ + 80 = 140
3 b. ______ + 10 + 60 = 110
4 a. 90 + 50 + _________ = 220
4 b. 90 + _________ + 70 = 240
5 a. _________ + 70 + 90 = 240
5 b. ______ + 50 + 30 = 160
6 a. 80 + ______ + 90 = 180
6 b. 70 + 40 + ______ = 170
7 a. ______ + 60 + 40 = 180
7 b. 90 + 70 + _________ = 250
8 a. ______ + 30 + 70 = 130
8 b. ______ + 20 + 20 = 100
Page 2

Answer Key

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


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