Addition Worksheet

Solve.

1 a. ______ + 90 + 90 + 40 = 250
1 b. 30 + ______ + 10 + 60 = 130
2 a. ______ + 50 + 50 + 70 = 210
2 b. 90 + 80 + 10 + ______ = 230
3 a. 80 + 90 + 60 + _________ = 260
3 b. 80 + 60 + 60 + ______ = 290
4 a. 40 + 50 + 60 + ______ = 160
4 b. ______ + 30 + 20 + 70 = 170
5 a. 20 + 40 + 90 + ______ = 160
5 b. 30 + 50 + ______ + 80 = 190
6 a. ______ + 40 + 40 + 50 = 140
6 b. 90 + 80 + 30 + _________ = 280
7 a. 20 + ______ + 40 + 50 = 120
7 b. ______ + 30 + 80 + 30 = 230
8 a. 40 + 90 + ______ + 40 = 180
8 b. ______ + 70 + 30 + 40 = 200
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Answer Key

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

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