Addition Worksheet

Solve.

1 a. 307 + _________ = 337
1 b. 315 + _________ = 385
2 a. 942 + _________ = 992
2 b. 215 + _________ = 275
3 a. 321 + _________ = 351
3 b. _________ + 30 = 292
4 a. _________ + 20 = 388
4 b. 956 + _________ = 996
5 a. 205 + _________ = 215
5 b. 282 + _________ = 292
6 a. 308 + _________ = 318
6 b. 854 + _________ = 874
7 a. _________ + 10 = 259
7 b. _________ + 10 = 292
8 a. ______ + 50 = 188
8 b. _________ + 30 = 733
9 a. 449 + _________ = 489
9 b. _________ + 30 = 367
10 a. _________ + 30 = 967
10 b. _________ + 50 = 395
Page 2

Answer Key

1 a. 30    
1 b. 70    
2 a. 50    
2 b. 60    
3 a. 30    
3 b. 262    
4 a. 368    
4 b. 40    
5 a. 10    
5 b. 10    
6 a. 10    
6 b. 20    
7 a. 249    
7 b. 282    
8 a. 138    
8 b. 703    
9 a. 40    
9 b. 337    
10 a. 937    
10 b. 345    

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