Addition Worksheet

Solve.

1 a. 2 + 10 + _________ = 812
1 b. 3 + _________ + 900 = 953
2 a. _________ + 5 + 800 = 885
2 b. 8 + _________ + 700 = 728
3 a. 1 + 50 + _________ = 251
3 b. ______ + 100 + 40 = 145
4 a. 3 + _________ + 400 = 403
4 b. _________ + 30 + 700 = 731
5 a. 60 + _________ + 600 = 667
5 b. 0 + 40 + _________ = 540
6 a. _________ + 20 + 9 = 729
6 b. 40 + _________ + 600 = 647
7 a. 8 + _________ + 40 = 348
7 b. 9 + 40 + _________ = 349
8 a. 0 + _________ + 30 = 730
8 b. _________ + 90 + 9 = 599
9 a. 800 + 30 + _________ = 835
9 b. _________ + 60 + 100 = 166
10 a. 90 + _________ + 500 = 594
10 b. _________ + 0 + 300 = 304
Page 2

Answer Key

1 a. 800    
1 b. 50    
2 a. 80    
2 b. 20    
3 a. 200    
3 b. 5    
4 a. 0    
4 b. 1    
5 a. 7    
5 b. 500    
6 a. 700    
6 b. 7    
7 a. 300    
7 b. 300    
8 a. 700    
8 b. 500    
9 a. 5    
9 b. 6    
10 a. 4    
10 b. 4    


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