Addition Worksheet

Solve.

1 a. _________ + 20 + 100 = 123
1 b. ______ + 30 + 100 = 132
2 a. _________ + 400 + 80 = 482
2 b. 9 + _________ + 400 = 429
3 a. _________ + 700 + 80 = 788
3 b. 8 + 90 + _________ = 698
4 a. _________ + 10 + 600 = 612
4 b. _________ + 20 + 500 = 526
5 a. 40 + _________ + 500 = 542
5 b. _________ + 10 + 200 = 216
6 a. _________ + 40 + 7 = 947
6 b. 4 + ______ + 100 = 194
7 a. 0 + _________ + 500 = 530
7 b. 0 + 400 + _________ = 410
Page 2

Answer Key

1 a. 3    
1 b. 2    
2 a. 2    
2 b. 20    
3 a. 8    
3 b. 600    
4 a. 2    
4 b. 6    
5 a. 2    
5 b. 6    
6 a. 900    
6 b. 90    
7 a. 30    
7 b. 10    


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