Addition Worksheet

Solve.

1 a. 8 + 40 + 300 = ________
1 b. 1 + 400 + 20 = ________
2 a. 70 + 2 + 300 = ________
2 b. 2 + 90 + 700 = ________
3 a. 700 + 40 + 1 = ________
3 b. 100 + 40 + 7 = ________
4 a. 5 + 200 + 60 = ________
4 b. 4 + 30 + 200 = ________
5 a. 6 + 20 + 300 = ________
5 b. 2 + 30 + 300 = ________
6 a. 9 + 700 + 40 = ________
6 b. 9 + 60 + 600 = ________
7 a. 500 + 50 + 4 = ________
7 b. 400 + 70 + 6 = ________
8 a. 10 + 5 + 400 = ________
8 b. 2 + 90 + 100 = ________
9 a. 3 + 300 + 70 = ________
9 b. 100 + 20 + 2 = ________
10 a. 1 + 70 + 700 = ________
10 b. 5 + 20 + 500 = ________
Page 2

Answer Key

1 a. 348    
1 b. 421    
2 a. 372    
2 b. 792    
3 a. 741    
3 b. 147    
4 a. 265    
4 b. 234    
5 a. 326    
5 b. 332    
6 a. 749    
6 b. 669    
7 a. 554    
7 b. 476    
8 a. 415    
8 b. 192    
9 a. 373    
9 b. 122    
10 a. 771    
10 b. 525    


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