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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 698 · 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. 1.204 + ? = 524
  2. 2.A train has 879 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  3. 3.805 + ? = 937
  4. 4.? + 553 = 809
  5. 5.508 − 110 =
  6. 6.A school has 973 children. 424 of them are girls. How many boys are there?
  7. 7.? − 532 = 212
  8. 8.611 − 315 =
  9. 9.866 − 696 =
  10. 10.A train has 687 people in the front coaches and 248 people in the back coaches. How many people are on the train?
  11. 11.A train has 582 people in the front coaches and 177 people in the back coaches. How many people are on the train?
  12. 12.460 − 350 =
  13. 13.A train has 305 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  14. 14.218 − ? = 54
  15. 15.A train has 317 people in the front coaches and 354 people in the back coaches. How many people are on the train?
  16. 16.597 + 322 =
  17. 17.298 + 260 =
  18. 18.A train has 845 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  19. 19.? − 623 = 121
  20. 20.610 − 236 =
  21. 21.? + 186 = 463
  22. 22.A train has 329 people in the front coaches and 247 people in the back coaches. How many people are on the train?
  23. 23.A train has 169 people in the front coaches and 254 people in the back coaches. How many people are on the train?
  24. 24.297 − 222 =
  25. 25.890 − 307 =
  26. 26.A train has 386 people in the front coaches and 499 people in the back coaches. How many people are on the train?
  27. 27.770 − 471 =
  28. 28.690 + 215 =
  29. 29.627 + ? = 735
  30. 30.A school has 477 children. 168 of them are girls. How many boys are there?
  31. 31.A school has 728 children. 126 of them are girls. How many boys are there?
  32. 32.A train has 264 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  33. 33.471 − ? = 249
  34. 34.A school has 365 children. 344 of them are girls. How many boys are there?
  35. 35.751 + ? = 902
  36. 36.A school has 271 children. 267 of them are girls. How many boys are there?
  37. 37.? + 775 = 952
  38. 38.A train has 658 people in the front coaches and 281 people in the back coaches. How many people are on the train?
  39. 39.A train has 874 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  40. 40.637 − 145 =

Answer key

  1. 320
  2. 979
  3. 132
  4. 256
  5. 398
  6. 549
  7. 744
  8. 296
  9. 170
  10. 935
  11. 759
  12. 110
  13. 540
  14. 164
  15. 671
  16. 919
  17. 558
  18. 993
  19. 744
  20. 374
  21. 277
  22. 576
  23. 423
  24. 75
  25. 583
  26. 885
  27. 299
  28. 905
  29. 108
  30. 309
  31. 602
  32. 371
  33. 222
  34. 21
  35. 151
  36. 4
  37. 177
  38. 939
  39. 986
  40. 492

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