Addition Worksheet

Solve.

1 a. _________ + 80 = 880
1 b. _________ + 40 = 550
2 a. _________ + 10 = 350
2 b. _________ + 10 = 490
3 a. _________ + 30 = 790
3 b. 140 + ______ = 190
4 a. 430 + _________ = 470
4 b. _________ + 10 = 470
5 a. 550 + _________ = 590
5 b. _________ + 0 = 850
6 a. 840 + _________ = 840
6 b. _________ + 30 = 750
7 a. 850 + _________ = 890
7 b. 660 + _________ = 670
8 a. _________ + 10 = 760
8 b. _________ + 10 = 770
9 a. _________ + 30 = 370
9 b. 700 + _________ = 730
10 a. _________ + 30 = 240
10 b. 950 + _________ = 970
Page 2

Answer Key

1 a. 800    
1 b. 510    
2 a. 340    
2 b. 480    
3 a. 760    
3 b. 50    
4 a. 40    
4 b. 460    
5 a. 40    
5 b. 850    
6 a. 0    
6 b. 720    
7 a. 40    
7 b. 10    
8 a. 750    
8 b. 760    
9 a. 340    
9 b. 30    
10 a. 210    
10 b. 20    

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