FreeMath
Grade 2medium

Three-Digit Addition Practice

Practice three-digit addition with regrouping. Adding larger numbers requires careful attention to place value and carrying across columns.

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All 20 Practice Problems

Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.

  1. 1.345 + 267 = ?
  2. 2.478 + 356 = ?
  3. 3.529 + 184 = ?
  4. 4.637 + 295 = ?
  5. 5.748 + 176 = ?
  6. 6.256 + 489 = ?
  7. 7.367 + 558 = ?
  8. 8.479 + 346 = ?
  9. 9.584 + 237 = ?
  10. 10.693 + 128 = ?
  11. 11.187 + 645 = ?
  12. 12.298 + 534 = ?
  13. 13.376 + 457 = ?
  14. 14.465 + 378 = ?
  15. 15.549 + 286 = ?
  16. 16.658 + 197 = ?
  17. 17.764 + 159 = ?
  18. 18.873 + 168 = ?
  19. 19.945 + 287 = ?
  20. 20.567 + 789 = ?
Show answer key
  1. 1.345 + 267 = ? Answer: 612
  2. 2.478 + 356 = ? Answer: 834
  3. 3.529 + 184 = ? Answer: 713
  4. 4.637 + 295 = ? Answer: 932
  5. 5.748 + 176 = ? Answer: 924
  6. 6.256 + 489 = ? Answer: 745
  7. 7.367 + 558 = ? Answer: 925
  8. 8.479 + 346 = ? Answer: 825
  9. 9.584 + 237 = ? Answer: 821
  10. 10.693 + 128 = ? Answer: 821
  11. 11.187 + 645 = ? Answer: 832
  12. 12.298 + 534 = ? Answer: 832
  13. 13.376 + 457 = ? Answer: 833
  14. 14.465 + 378 = ? Answer: 843
  15. 15.549 + 286 = ? Answer: 835
  16. 16.658 + 197 = ? Answer: 855
  17. 17.764 + 159 = ? Answer: 923
  18. 18.873 + 168 = ? Answer: 1041
  19. 19.945 + 287 = ? Answer: 1232
  20. 20.567 + 789 = ? Answer: 1356

About This Practice

This practice set includes 20 three-digit addition problems that require regrouping. Building strong addition skills creates a foundation for all mathematical operations.

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