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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 683 · 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. 1.718 − ? = 225
  2. 2.? + 502 = 939
  3. 3.500 + 339 =
  4. 4.397 − 211 =
  5. 5.A school has 376 children. 163 of them are girls. How many boys are there?
  6. 6.A train has 504 people in the front coaches and 401 people in the back coaches. How many people are on the train?
  7. 7.454 + 145 =
  8. 8.A school has 411 children. 133 of them are girls. How many boys are there?
  9. 9.128 + ? = 697
  10. 10.248 − ? = 106
  11. 11.? + 592 = 947
  12. 12.A school has 618 children. 116 of them are girls. How many boys are there?
  13. 13.A train has 760 people in the front coaches and 211 people in the back coaches. How many people are on the train?
  14. 14.A school has 901 children. 304 of them are girls. How many boys are there?
  15. 15.904 − ? = 693
  16. 16.209 − ? = 103
  17. 17.991 − 127 =
  18. 18.403 + 531 =
  19. 19.790 + 123 =
  20. 20.A school has 602 children. 561 of them are girls. How many boys are there?
  21. 21.854 − 303 =
  22. 22.666 + 328 =
  23. 23.A school has 704 children. 198 of them are girls. How many boys are there?
  24. 24.? − 241 = 171
  25. 25.A train has 610 people in the front coaches and 387 people in the back coaches. How many people are on the train?
  26. 26.834 − 508 =
  27. 27.? − 691 = 184
  28. 28.981 − ? = 386
  29. 29.A school has 271 children. 100 of them are girls. How many boys are there?
  30. 30.A train has 689 people in the front coaches and 297 people in the back coaches. How many people are on the train?
  31. 31.A train has 636 people in the front coaches and 345 people in the back coaches. How many people are on the train?
  32. 32.398 − ? = 260
  33. 33.? − 251 = 216
  34. 34.A school has 343 children. 311 of them are girls. How many boys are there?
  35. 35.618 − 544 =
  36. 36.598 − ? = 22
  37. 37.318 − ? = 151
  38. 38.424 − 232 =
  39. 39.388 + 469 =
  40. 40.338 − 322 =

Answer key

  1. 493
  2. 437
  3. 839
  4. 186
  5. 213
  6. 905
  7. 599
  8. 278
  9. 569
  10. 142
  11. 355
  12. 502
  13. 971
  14. 597
  15. 211
  16. 106
  17. 864
  18. 934
  19. 913
  20. 41
  21. 551
  22. 994
  23. 506
  24. 412
  25. 997
  26. 326
  27. 875
  28. 595
  29. 171
  30. 986
  31. 981
  32. 138
  33. 467
  34. 32
  35. 74
  36. 576
  37. 167
  38. 192
  39. 857
  40. 16

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