Addition Worksheet

Solve.

1 a. 140 + ______ = 180
1 b. 600 + _________ = 630
2 a. _________ + 50 = 980
2 b. 540 + _________ = 570
3 a. _________ + 40 = 690
3 b. _________ + 40 = 870
4 a. 510 + _________ = 520
4 b. 300 + _________ = 340
5 a. _________ + 20 = 560
5 b. 260 + _________ = 270
6 a. 420 + _________ = 490
6 b. 840 + _________ = 880
7 a. _________ + 20 = 360
7 b. _________ + 60 = 460
8 a. _________ + 70 = 580
8 b. 330 + _________ = 390
9 a. _________ + 10 = 480
9 b. _________ + 80 = 390
10 a. 560 + _________ = 580
10 b. 240 + _________ = 280
Page 2

Answer Key

1 a. 40    
1 b. 30    
2 a. 930    
2 b. 30    
3 a. 650    
3 b. 830    
4 a. 10    
4 b. 40    
5 a. 540    
5 b. 10    
6 a. 70    
6 b. 40    
7 a. 340    
7 b. 400    
8 a. 510    
8 b. 60    
9 a. 470    
9 b. 310    
10 a. 20    
10 b. 40    


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