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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 426 · 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. 1.823 − 655 =
  2. 2.? + 429 = 709
  3. 3.188 + ? = 728
  4. 4.577 − 471 =
  5. 5.290 − ? = 6
  6. 6.A train has 552 people in the front coaches and 308 people in the back coaches. How many people are on the train?
  7. 7.A school has 311 children. 297 of them are girls. How many boys are there?
  8. 8.? + 530 = 967
  9. 9.612 − 242 =
  10. 10.A train has 121 people in the front coaches and 496 people in the back coaches. How many people are on the train?
  11. 11.636 − 188 =
  12. 12.225 + ? = 804
  13. 13.203 + 787 =
  14. 14.? + 861 = 979
  15. 15.486 − 467 =
  16. 16.248 + ? = 401
  17. 17.A train has 282 people in the front coaches and 588 people in the back coaches. How many people are on the train?
  18. 18.452 − 241 =
  19. 19.184 + 793 =
  20. 20.751 − 653 =
  21. 21.273 + ? = 434
  22. 22.A train has 114 people in the front coaches and 866 people in the back coaches. How many people are on the train?
  23. 23.A train has 753 people in the front coaches and 233 people in the back coaches. How many people are on the train?
  24. 24.627 − 160 =
  25. 25.556 − 158 =
  26. 26.801 − 649 =
  27. 27.905 − 601 =
  28. 28.? − 306 = 11
  29. 29.A train has 126 people in the front coaches and 183 people in the back coaches. How many people are on the train?
  30. 30.A train has 412 people in the front coaches and 567 people in the back coaches. How many people are on the train?
  31. 31.373 + ? = 952
  32. 32.766 + ? = 906
  33. 33.368 − 217 =
  34. 34.708 − 143 =
  35. 35.666 − 302 =
  36. 36.867 − 557 =
  37. 37.294 − ? = 103
  38. 38.A train has 421 people in the front coaches and 436 people in the back coaches. How many people are on the train?
  39. 39.804 + ? = 910
  40. 40.880 − 807 =

Answer key

  1. 168
  2. 280
  3. 540
  4. 106
  5. 284
  6. 860
  7. 14
  8. 437
  9. 370
  10. 617
  11. 448
  12. 579
  13. 990
  14. 118
  15. 19
  16. 153
  17. 870
  18. 211
  19. 977
  20. 98
  21. 161
  22. 980
  23. 986
  24. 467
  25. 398
  26. 152
  27. 304
  28. 317
  29. 309
  30. 979
  31. 579
  32. 140
  33. 151
  34. 565
  35. 364
  36. 310
  37. 191
  38. 857
  39. 106
  40. 73

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