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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 52 · 40 sums
TalentJR

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

NameDateTime takenScore ___ / 40
  1. 1.113 + ? = 614
  2. 2.230 + ? = 577
  3. 3.? + 851 = 979
  4. 4.A train has 335 people in the front coaches and 551 people in the back coaches. How many people are on the train?
  5. 5.294 + 150 =
  6. 6.? + 853 = 987
  7. 7.A school has 547 children. 503 of them are girls. How many boys are there?
  8. 8.747 − 448 =
  9. 9.135 + 274 =
  10. 10.? − 239 = 9
  11. 11.393 − 130 =
  12. 12.224 + ? = 399
  13. 13.642 + 101 =
  14. 14.? − 631 = 141
  15. 15.328 − 319 =
  16. 16.835 − 236 =
  17. 17.714 + ? = 956
  18. 18.? + 529 = 884
  19. 19.A train has 608 people in the front coaches and 378 people in the back coaches. How many people are on the train?
  20. 20.749 − 519 =
  21. 21.A train has 316 people in the front coaches and 135 people in the back coaches. How many people are on the train?
  22. 22.A train has 655 people in the front coaches and 262 people in the back coaches. How many people are on the train?
  23. 23.430 − ? = 197
  24. 24.A school has 834 children. 271 of them are girls. How many boys are there?
  25. 25.A school has 963 children. 923 of them are girls. How many boys are there?
  26. 26.A train has 165 people in the front coaches and 779 people in the back coaches. How many people are on the train?
  27. 27.? + 374 = 775
  28. 28.404 − 291 =
  29. 29.760 − 734 =
  30. 30.612 + 253 =
  31. 31.431 − ? = 241
  32. 32.A school has 830 children. 298 of them are girls. How many boys are there?
  33. 33.? + 736 = 974
  34. 34.949 − ? = 416
  35. 35.780 − ? = 192
  36. 36.778 + 201 =
  37. 37.106 + ? = 471
  38. 38.273 + 261 =
  39. 39.535 + ? = 687
  40. 40.A train has 135 people in the front coaches and 296 people in the back coaches. How many people are on the train?

Answer key

  1. 501
  2. 347
  3. 128
  4. 886
  5. 444
  6. 134
  7. 44
  8. 299
  9. 409
  10. 248
  11. 263
  12. 175
  13. 743
  14. 772
  15. 9
  16. 599
  17. 242
  18. 355
  19. 986
  20. 230
  21. 451
  22. 917
  23. 233
  24. 563
  25. 40
  26. 944
  27. 401
  28. 113
  29. 26
  30. 865
  31. 190
  32. 532
  33. 238
  34. 533
  35. 588
  36. 979
  37. 365
  38. 534
  39. 152
  40. 431

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