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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 466 · 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. 1.782 − 237 =
  2. 2.916 − 877 =
  3. 3.847 − 626 =
  4. 4.A school has 597 children. 510 of them are girls. How many boys are there?
  5. 5.A train has 359 people in the front coaches and 403 people in the back coaches. How many people are on the train?
  6. 6.904 − 426 =
  7. 7.269 − 150 =
  8. 8.524 + 144 =
  9. 9.? − 197 = 242
  10. 10.302 − ? = 87
  11. 11.A school has 448 children. 113 of them are girls. How many boys are there?
  12. 12.A train has 453 people in the front coaches and 377 people in the back coaches. How many people are on the train?
  13. 13.367 + ? = 949
  14. 14.413 + ? = 757
  15. 15.A train has 813 people in the front coaches and 132 people in the back coaches. How many people are on the train?
  16. 16.759 − 531 =
  17. 17.A train has 597 people in the front coaches and 292 people in the back coaches. How many people are on the train?
  18. 18.A train has 289 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  19. 19.641 − ? = 304
  20. 20.335 − ? = 81
  21. 21.459 + 221 =
  22. 22.584 + ? = 744
  23. 23.A school has 547 children. 237 of them are girls. How many boys are there?
  24. 24.A train has 119 people in the front coaches and 385 people in the back coaches. How many people are on the train?
  25. 25.261 + ? = 858
  26. 26.406 + 527 =
  27. 27.545 + 248 =
  28. 28.A school has 423 children. 387 of them are girls. How many boys are there?
  29. 29.968 − 434 =
  30. 30.A school has 713 children. 191 of them are girls. How many boys are there?
  31. 31.473 + ? = 635
  32. 32.238 − 192 =
  33. 33.? + 126 = 747
  34. 34.A school has 520 children. 150 of them are girls. How many boys are there?
  35. 35.554 − 409 =
  36. 36.729 + ? = 889
  37. 37.613 − ? = 165
  38. 38.A school has 480 children. 333 of them are girls. How many boys are there?
  39. 39.A school has 746 children. 232 of them are girls. How many boys are there?
  40. 40.A school has 313 children. 160 of them are girls. How many boys are there?

Answer key

  1. 545
  2. 39
  3. 221
  4. 87
  5. 762
  6. 478
  7. 119
  8. 668
  9. 439
  10. 215
  11. 335
  12. 830
  13. 582
  14. 344
  15. 945
  16. 228
  17. 889
  18. 441
  19. 337
  20. 254
  21. 680
  22. 160
  23. 310
  24. 504
  25. 597
  26. 933
  27. 793
  28. 36
  29. 534
  30. 522
  31. 162
  32. 46
  33. 621
  34. 370
  35. 145
  36. 160
  37. 448
  38. 147
  39. 514
  40. 153

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