Addition Worksheet

Solve.

1 a. 7 + _________ + 800 = 817
1 b. _________ + 900 + 90 = 992
2 a. 5 + ______ + 100 = 135
2 b. _________ + 80 + 600 = 680
3 a. _________ + 40 + 500 = 547
3 b. _________ + 700 + 30 = 734
4 a. 30 + _________ + 400 = 433
4 b. 200 + _________ + 2 = 232
5 a. 3 + _________ + 500 = 573
5 b. 5 + _________ + 700 = 745
6 a. 2 + 900 + _________ = 952
6 b. _________ + 100 + 50 = 159
7 a. 7 + 40 + _________ = 547
7 b. _________ + 40 + 400 = 443
Page 2

Answer Key

1 a. 10    
1 b. 2    
2 a. 30    
2 b. 0    
3 a. 7    
3 b. 4    
4 a. 3    
4 b. 30    
5 a. 70    
5 b. 40    
6 a. 50    
6 b. 9    
7 a. 500    
7 b. 3    


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