Addition Worksheet 1

1 a.   

340 + _________ = 360

1 b.   

320 + _________ = 390

2 a.   

_________ + 20 = 890

2 b.   

_________ + 10 = 520

3 a.   

_________ + 10 = 840

3 b.   

530 + _________ = 540

4 a.   

620 + _________ = 650

4 b.   

_________ + 10 = 420

5 a.   

360 + _________ = 380

5 b.   

_________ + 80 = 790

6 a.   

_________ + 30 = 440

6 b.   

600 + _________ = 630

7 a.   

430 + _________ = 470

7 b.   

_________ + 50 = 780

8 a.   

_________ + 30 = 960

8 b.   

______ + 20 = 120

9 a.   

210 + _________ = 220

9 b.   

710 + _________ = 780

10 a.   

_________ + 30 = 870

10 b.   

910 + _________ = 990

 

Answer Key

 

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