Addition Worksheet

Solve.

1 a. 100 + _________ + 9 = 119
1 b. _________ + 40 + 900 = 947
2 a. _________ + 60 + 900 = 964
2 b. _________ + 0 + 500 = 503
3 a. _________ + 90 + 3 = 893
3 b. _________ + 9 + 500 = 549
4 a. _________ + 60 + 700 = 769
4 b. 0 + _________ + 100 = 180
5 a. _________ + 60 + 400 = 461
5 b. 1 + 50 + _________ = 551
6 a. 20 + 4 + ______ = 124
6 b. 200 + 10 + _________ = 211
7 a. 3 + _________ + 600 = 603
7 b. 600 + 70 + _________ = 670
8 a. 9 + _________ + 60 = 169
8 b. 4 + 700 + _________ = 734
9 a. 600 + _________ + 5 = 645
9 b. 8 + 600 + _________ = 648
10 a. _________ + 40 + 200 = 243
10 b. 4 + 300 + _________ = 344
Page 2

Answer Key

1 a. 10    
1 b. 7    
2 a. 4    
2 b. 3    
3 a. 800    
3 b. 40    
4 a. 9    
4 b. 80    
5 a. 1    
5 b. 500    
6 a. 100    
6 b. 1    
7 a. 0    
7 b. 0    
8 a. 100    
8 b. 30    
9 a. 40    
9 b. 40    
10 a. 3    
10 b. 40    


Copying permission: You are free to copy this worksheet to any number of students for their mathematics work. Do not distribute on websites, books, or any such material without permission. Copyright www.HomeschoolMath.net