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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 60 · 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 803 children. 479 of them are girls. How many boys are there?
  2. 2.200 − 193 =
  3. 3.? − 380 = 105
  4. 4.657 − ? = 209
  5. 5.A train has 182 people in the front coaches and 524 people in the back coaches. How many people are on the train?
  6. 6.? + 354 = 833
  7. 7.204 + 314 =
  8. 8.A train has 428 people in the front coaches and 422 people in the back coaches. How many people are on the train?
  9. 9.207 + 397 =
  10. 10.233 − 106 =
  11. 11.870 + 117 =
  12. 12.? + 822 = 956
  13. 13.239 + ? = 818
  14. 14.220 − 190 =
  15. 15.? + 790 = 919
  16. 16.803 + 105 =
  17. 17.756 − 262 =
  18. 18.? − 548 = 35
  19. 19.647 + 288 =
  20. 20.? + 515 = 861
  21. 21.799 − ? = 332
  22. 22.739 + 160 =
  23. 23.? − 253 = 80
  24. 24.384 + 457 =
  25. 25.332 − 199 =
  26. 26.581 + 290 =
  27. 27.581 + 163 =
  28. 28.444 + 318 =
  29. 29.A train has 407 people in the front coaches and 494 people in the back coaches. How many people are on the train?
  30. 30.? + 776 = 886
  31. 31.? + 723 = 971
  32. 32.A train has 684 people in the front coaches and 282 people in the back coaches. How many people are on the train?
  33. 33.549 − ? = 212
  34. 34.A school has 772 children. 270 of them are girls. How many boys are there?
  35. 35.252 − ? = 35
  36. 36.A train has 374 people in the front coaches and 336 people in the back coaches. How many people are on the train?
  37. 37.703 − 469 =
  38. 38.387 − 281 =
  39. 39.A school has 429 children. 377 of them are girls. How many boys are there?
  40. 40.A train has 232 people in the front coaches and 524 people in the back coaches. How many people are on the train?

Answer key

  1. 324
  2. 7
  3. 485
  4. 448
  5. 706
  6. 479
  7. 518
  8. 850
  9. 604
  10. 127
  11. 987
  12. 134
  13. 579
  14. 30
  15. 129
  16. 908
  17. 494
  18. 583
  19. 935
  20. 346
  21. 467
  22. 899
  23. 333
  24. 841
  25. 133
  26. 871
  27. 744
  28. 762
  29. 901
  30. 110
  31. 248
  32. 966
  33. 337
  34. 502
  35. 217
  36. 710
  37. 234
  38. 106
  39. 52
  40. 756

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