Addition Worksheet

Solve.

1 a. 630 + _________ = 690
1 b. _________ + 20 = 260
2 a. _________ + 20 = 690
2 b. _________ + 30 = 270
3 a. _________ + 40 = 940
3 b. _________ + 30 = 690
4 a. 160 + ______ = 190
4 b. 720 + _________ = 770
5 a. 760 + _________ = 770
5 b. _________ + 10 = 820
6 a. 510 + _________ = 540
6 b. _________ + 10 = 840
7 a. 740 + _________ = 790
7 b. _________ + 20 = 320
8 a. 680 + _________ = 690
8 b. 940 + _________ = 980
9 a. 910 + _________ = 940
9 b. _________ + 20 = 240
10 a. 750 + _________ = 790
10 b. 340 + _________ = 380
Page 2

Answer Key

1 a. 60    
1 b. 240    
2 a. 670    
2 b. 240    
3 a. 900    
3 b. 660    
4 a. 30    
4 b. 50    
5 a. 10    
5 b. 810    
6 a. 30    
6 b. 830    
7 a. 50    
7 b. 300    
8 a. 10    
8 b. 40    
9 a. 30    
9 b. 220    
10 a. 40    
10 b. 40    


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