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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 896 · 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 school has 603 children. 143 of them are girls. How many boys are there?
  2. 2.? − 382 = 56
  3. 3.257 + 301 =
  4. 4.317 + 163 =
  5. 5.392 + 555 =
  6. 6.A school has 866 children. 181 of them are girls. How many boys are there?
  7. 7.A school has 294 children. 287 of them are girls. How many boys are there?
  8. 8.149 + 806 =
  9. 9.550 − 342 =
  10. 10.A school has 938 children. 337 of them are girls. How many boys are there?
  11. 11.A school has 914 children. 327 of them are girls. How many boys are there?
  12. 12.A school has 385 children. 281 of them are girls. How many boys are there?
  13. 13.291 + ? = 536
  14. 14.599 − ? = 226
  15. 15.A train has 247 people in the front coaches and 230 people in the back coaches. How many people are on the train?
  16. 16.181 + 690 =
  17. 17.161 + 783 =
  18. 18.983 − 510 =
  19. 19.690 − ? = 548
  20. 20.544 − 259 =
  21. 21.? − 207 = 264
  22. 22.? − 474 = 229
  23. 23.A school has 221 children. 173 of them are girls. How many boys are there?
  24. 24.233 + 414 =
  25. 25.640 + ? = 755
  26. 26.594 + ? = 744
  27. 27.456 + 406 =
  28. 28.286 + 123 =
  29. 29.899 − 377 =
  30. 30.832 − 819 =
  31. 31.394 + ? = 904
  32. 32.803 + 180 =
  33. 33.685 − 602 =
  34. 34.A school has 677 children. 637 of them are girls. How many boys are there?
  35. 35.A school has 322 children. 292 of them are girls. How many boys are there?
  36. 36.A train has 147 people in the front coaches and 460 people in the back coaches. How many people are on the train?
  37. 37.225 − 184 =
  38. 38.A train has 401 people in the front coaches and 255 people in the back coaches. How many people are on the train?
  39. 39.789 − ? = 646
  40. 40.124 + 179 =

Answer key

  1. 460
  2. 438
  3. 558
  4. 480
  5. 947
  6. 685
  7. 7
  8. 955
  9. 208
  10. 601
  11. 587
  12. 104
  13. 245
  14. 373
  15. 477
  16. 871
  17. 944
  18. 473
  19. 142
  20. 285
  21. 471
  22. 703
  23. 48
  24. 647
  25. 115
  26. 150
  27. 862
  28. 409
  29. 522
  30. 13
  31. 510
  32. 983
  33. 83
  34. 40
  35. 30
  36. 607
  37. 41
  38. 656
  39. 143
  40. 303

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