Addition Worksheet 1

1 a.   

 800 + _________ = 1000

1 b.   

 900 + _________ = 1100

2 a.   

 _________ + 1000 = 1800

2 b.   

 400 + _________ = 600

3 a.   

 900 + _________ = 900

3 b.   

 200 + _________ = 800

4 a.   

 300 + _________ = 300

4 b.   

 _________ + 600 = 1500

5 a.   

 900 + _________ = 1600

5 b.   

 1000 + _________ = 1000

6 a.   

 600 + _________ = 1300

6 b.   

 _________ + 900 = 1800

7 a.   

 _________ + 400 = 600

7 b.   

 _________ + 100 = 800

8 a.   

 1000 + ____________ = 2000

8 b.   

 _________ + 200 = 600

9 a.   

 400 + _________ = 1400

9 b.   

 _________ + 300 = 400

10 a.   

 200 + _________ = 1000

10 b.   

 1000 + _________ = 1500

 

Answer Key

 

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