Addition Worksheet

Solve.

1 a. 630 + _________ = 680
1 b. 110 + ______ = 160
2 a. _________ + 10 = 860
2 b. 150 + ______ = 170
3 a. _________ + 20 = 530
3 b. 440 + _________ = 480
4 a. 940 + _________ = 990
4 b. 940 + _________ = 970
5 a. 440 + _________ = 470
5 b. _________ + 50 = 670
6 a. 950 + _________ = 960
6 b. 610 + _________ = 660
7 a. 310 + _________ = 390
7 b. 430 + _________ = 490
8 a. 170 + ______ = 180
8 b. _________ + 60 = 380
9 a. 770 + _________ = 790
9 b. _________ + 40 = 880
10 a. 660 + _________ = 680
10 b. 830 + _________ = 880
Page 2

Answer Key

1 a. 50    
1 b. 50    
2 a. 850    
2 b. 20    
3 a. 510    
3 b. 40    
4 a. 50    
4 b. 30    
5 a. 30    
5 b. 620    
6 a. 10    
6 b. 50    
7 a. 80    
7 b. 60    
8 a. 10    
8 b. 320    
9 a. 20    
9 b. 840    
10 a. 20    
10 b. 50    


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