Addition Worksheet

Solve.

1 a. _________ + 10 + 3 = 313
1 b. _________ + 10 + 500 = 511
2 a. 500 + 90 + _________ = 591
2 b. 4 + _________ + 400 = 444
3 a. _________ + 900 + 10 = 916
3 b. 90 + _________ + 600 = 694
4 a. _________ + 10 + 400 = 418
4 b. 800 + 90 + _________ = 893
5 a. 50 + _________ + 800 = 852
5 b. _________ + 20 + 900 = 923
6 a. 7 + _________ + 700 = 787
6 b. _________ + 50 + 800 = 854
7 a. 7 + _________ + 300 = 327
7 b. 6 + 30 + ______ = 136
Page 2

Answer Key

1 a. 300    
1 b. 1    
2 a. 1    
2 b. 40    
3 a. 6    
3 b. 4    
4 a. 8    
4 b. 3    
5 a. 2    
5 b. 3    
6 a. 80    
6 b. 4    
7 a. 20    
7 b. 100    


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