Addition Worksheet 1

1 a.   

_________ + 20 = 850

1 b.   

300 + _________ = 320

2 a.   

_________ + 10 = 820

2 b.   

_________ + 20 = 890

3 a.   

______ + 10 = 170

3 b.   

_________ + 80 = 980

4 a.   

_________ + 40 = 490

4 b.   

740 + _________ = 780

5 a.   

540 + _________ = 550

5 b.   

520 + _________ = 570

6 a.   

_________ + 20 = 840

6 b.   

_________ + 20 = 370

7 a.   

640 + _________ = 650

7 b.   

_________ + 10 = 210

8 a.   

160 + ______ = 160

8 b.   

840 + _________ = 870

9 a.   

_________ + 40 = 350

9 b.   

460 + _________ = 480

10 a.   

_________ + 70 = 770

10 b.   

120 + ______ = 170

 

Answer Key

 

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