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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 395 · 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. 1.839 + 121 =
  2. 2.673 − 477 =
  3. 3.A school has 813 children. 328 of them are girls. How many boys are there?
  4. 4.A school has 653 children. 452 of them are girls. How many boys are there?
  5. 5.? − 180 = 502
  6. 6.A school has 547 children. 211 of them are girls. How many boys are there?
  7. 7.A train has 587 people in the front coaches and 351 people in the back coaches. How many people are on the train?
  8. 8.674 − 562 =
  9. 9.888 + 102 =
  10. 10.? − 322 = 416
  11. 11.A train has 579 people in the front coaches and 388 people in the back coaches. How many people are on the train?
  12. 12.818 − ? = 573
  13. 13.A school has 660 children. 602 of them are girls. How many boys are there?
  14. 14.A school has 700 children. 102 of them are girls. How many boys are there?
  15. 15.892 − 117 =
  16. 16.A school has 404 children. 100 of them are girls. How many boys are there?
  17. 17.A train has 450 people in the front coaches and 501 people in the back coaches. How many people are on the train?
  18. 18.643 + 107 =
  19. 19.A train has 180 people in the front coaches and 525 people in the back coaches. How many people are on the train?
  20. 20.416 − ? = 307
  21. 21.283 + ? = 514
  22. 22.136 + 836 =
  23. 23.345 + ? = 539
  24. 24.A school has 517 children. 232 of them are girls. How many boys are there?
  25. 25.A train has 300 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  26. 26.? + 416 = 916
  27. 27.A train has 557 people in the front coaches and 430 people in the back coaches. How many people are on the train?
  28. 28.945 − 872 =
  29. 29.? + 199 = 427
  30. 30.252 + 156 =
  31. 31.? + 633 = 960
  32. 32.A train has 472 people in the front coaches and 214 people in the back coaches. How many people are on the train?
  33. 33.887 − 256 =
  34. 34.786 + 124 =
  35. 35.714 − 571 =
  36. 36.854 + 105 =
  37. 37.735 − ? = 580
  38. 38.A train has 569 people in the front coaches and 322 people in the back coaches. How many people are on the train?
  39. 39.332 + ? = 444
  40. 40.631 − 474 =

Answer key

  1. 960
  2. 196
  3. 485
  4. 201
  5. 682
  6. 336
  7. 938
  8. 112
  9. 990
  10. 738
  11. 967
  12. 245
  13. 58
  14. 598
  15. 775
  16. 304
  17. 951
  18. 750
  19. 705
  20. 109
  21. 231
  22. 972
  23. 194
  24. 285
  25. 482
  26. 500
  27. 987
  28. 73
  29. 228
  30. 408
  31. 327
  32. 686
  33. 631
  34. 910
  35. 143
  36. 959
  37. 155
  38. 891
  39. 112
  40. 157

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