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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 78 · 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.A train has 555 people in the front coaches and 320 people in the back coaches. How many people are on the train?
  2. 2.A train has 468 people in the front coaches and 466 people in the back coaches. How many people are on the train?
  3. 3.698 + 250 =
  4. 4.604 + ? = 753
  5. 5.A train has 554 people in the front coaches and 299 people in the back coaches. How many people are on the train?
  6. 6.A school has 910 children. 295 of them are girls. How many boys are there?
  7. 7.? − 231 = 474
  8. 8.? + 670 = 807
  9. 9.581 + 141 =
  10. 10.? + 222 = 598
  11. 11.? − 128 = 123
  12. 12.A train has 743 people in the front coaches and 164 people in the back coaches. How many people are on the train?
  13. 13.404 + ? = 693
  14. 14.190 + 533 =
  15. 15.A school has 556 children. 491 of them are girls. How many boys are there?
  16. 16.? − 228 = 88
  17. 17.? − 908 = 91
  18. 18.A school has 818 children. 640 of them are girls. How many boys are there?
  19. 19.377 + 367 =
  20. 20.A train has 454 people in the front coaches and 332 people in the back coaches. How many people are on the train?
  21. 21.? − 311 = 332
  22. 22.781 − 549 =
  23. 23.? + 659 = 769
  24. 24.889 + 105 =
  25. 25.325 + ? = 852
  26. 26.548 − 516 =
  27. 27.A school has 316 children. 105 of them are girls. How many boys are there?
  28. 28.A school has 246 children. 144 of them are girls. How many boys are there?
  29. 29.923 − 612 =
  30. 30.593 − 500 =
  31. 31.272 + 407 =
  32. 32.A train has 604 people in the front coaches and 299 people in the back coaches. How many people are on the train?
  33. 33.532 − 523 =
  34. 34.763 − ? = 367
  35. 35.A train has 268 people in the front coaches and 561 people in the back coaches. How many people are on the train?
  36. 36.964 − 423 =
  37. 37.765 − 644 =
  38. 38.A train has 381 people in the front coaches and 509 people in the back coaches. How many people are on the train?
  39. 39.796 − 724 =
  40. 40.640 − ? = 82

Answer key

  1. 875
  2. 934
  3. 948
  4. 149
  5. 853
  6. 615
  7. 705
  8. 137
  9. 722
  10. 376
  11. 251
  12. 907
  13. 289
  14. 723
  15. 65
  16. 316
  17. 999
  18. 178
  19. 744
  20. 786
  21. 643
  22. 232
  23. 110
  24. 994
  25. 527
  26. 32
  27. 211
  28. 102
  29. 311
  30. 93
  31. 679
  32. 903
  33. 9
  34. 396
  35. 829
  36. 541
  37. 121
  38. 890
  39. 72
  40. 558

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