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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 47 · 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. 1.602 − ? = 222
  2. 2.300 + 512 =
  3. 3.590 − 479 =
  4. 4.A train has 218 people in the front coaches and 406 people in the back coaches. How many people are on the train?
  5. 5.? − 159 = 206
  6. 6.? + 859 = 961
  7. 7.976 − 427 =
  8. 8.? + 446 = 966
  9. 9.916 − 245 =
  10. 10.? + 196 = 458
  11. 11.885 − 286 =
  12. 12.663 + 146 =
  13. 13.? − 336 = 37
  14. 14.A train has 530 people in the front coaches and 165 people in the back coaches. How many people are on the train?
  15. 15.? − 142 = 147
  16. 16.? + 615 = 983
  17. 17.? − 296 = 401
  18. 18.491 + ? = 742
  19. 19.A train has 592 people in the front coaches and 392 people in the back coaches. How many people are on the train?
  20. 20.511 + 133 =
  21. 21.413 − 153 =
  22. 22.863 + 114 =
  23. 23.632 + 326 =
  24. 24.A school has 594 children. 349 of them are girls. How many boys are there?
  25. 25.832 + 105 =
  26. 26.? − 631 = 51
  27. 27.376 + 444 =
  28. 28.388 + ? = 893
  29. 29.858 + ? = 992
  30. 30.A train has 534 people in the front coaches and 361 people in the back coaches. How many people are on the train?
  31. 31.352 + 267 =
  32. 32.A train has 203 people in the front coaches and 761 people in the back coaches. How many people are on the train?
  33. 33.873 + 110 =
  34. 34.A school has 693 children. 662 of them are girls. How many boys are there?
  35. 35.805 + 122 =
  36. 36.A school has 229 children. 168 of them are girls. How many boys are there?
  37. 37.? − 134 = 551
  38. 38.A train has 478 people in the front coaches and 375 people in the back coaches. How many people are on the train?
  39. 39.A school has 661 children. 241 of them are girls. How many boys are there?
  40. 40.348 + 614 =

Answer key

  1. 380
  2. 812
  3. 111
  4. 624
  5. 365
  6. 102
  7. 549
  8. 520
  9. 671
  10. 262
  11. 599
  12. 809
  13. 373
  14. 695
  15. 289
  16. 368
  17. 697
  18. 251
  19. 984
  20. 644
  21. 260
  22. 977
  23. 958
  24. 245
  25. 937
  26. 682
  27. 820
  28. 505
  29. 134
  30. 895
  31. 619
  32. 964
  33. 983
  34. 31
  35. 927
  36. 61
  37. 685
  38. 853
  39. 420
  40. 962

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