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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 554 · 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. 1.704 − 453 =
  2. 2.733 − 505 =
  3. 3.A train has 302 people in the front coaches and 663 people in the back coaches. How many people are on the train?
  4. 4.416 − 333 =
  5. 5.A train has 124 people in the front coaches and 667 people in the back coaches. How many people are on the train?
  6. 6.596 + ? = 983
  7. 7.A school has 226 children. 168 of them are girls. How many boys are there?
  8. 8.A school has 272 children. 256 of them are girls. How many boys are there?
  9. 9.393 + ? = 945
  10. 10.453 + 189 =
  11. 11.A train has 825 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  12. 12.A train has 745 people in the front coaches and 216 people in the back coaches. How many people are on the train?
  13. 13.455 − ? = 296
  14. 14.A train has 592 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  15. 15.A school has 834 children. 734 of them are girls. How many boys are there?
  16. 16.110 + 436 =
  17. 17.814 − 436 =
  18. 18.? − 345 = 187
  19. 19.A train has 860 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  20. 20.810 − 459 =
  21. 21.764 − 101 =
  22. 22.227 + 212 =
  23. 23.711 + 190 =
  24. 24.408 − ? = 278
  25. 25.300 + 535 =
  26. 26.A school has 261 children. 224 of them are girls. How many boys are there?
  27. 27.A train has 322 people in the front coaches and 403 people in the back coaches. How many people are on the train?
  28. 28.243 + 593 =
  29. 29.819 + ? = 956
  30. 30.325 − 131 =
  31. 31.262 + ? = 844
  32. 32.194 + 222 =
  33. 33.624 + 354 =
  34. 34.332 − 220 =
  35. 35.? + 340 = 864
  36. 36.870 + 116 =
  37. 37.472 + 484 =
  38. 38.781 − 440 =
  39. 39.? + 722 = 868
  40. 40.A train has 397 people in the front coaches and 150 people in the back coaches. How many people are on the train?

Answer key

  1. 251
  2. 228
  3. 965
  4. 83
  5. 791
  6. 387
  7. 58
  8. 16
  9. 552
  10. 642
  11. 943
  12. 961
  13. 159
  14. 694
  15. 100
  16. 546
  17. 378
  18. 532
  19. 968
  20. 351
  21. 663
  22. 439
  23. 901
  24. 130
  25. 835
  26. 37
  27. 725
  28. 836
  29. 137
  30. 194
  31. 582
  32. 416
  33. 978
  34. 112
  35. 524
  36. 986
  37. 956
  38. 341
  39. 146
  40. 547

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