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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 382 · 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. 1.752 + ? = 981
  2. 2.A school has 364 children. 210 of them are girls. How many boys are there?
  3. 3.A train has 187 people in the front coaches and 242 people in the back coaches. How many people are on the train?
  4. 4.A train has 325 people in the front coaches and 495 people in the back coaches. How many people are on the train?
  5. 5.? − 184 = 139
  6. 6.? + 367 = 729
  7. 7.998 − 560 =
  8. 8.692 − 243 =
  9. 9.237 − 199 =
  10. 10.960 − 710 =
  11. 11.? − 230 = 367
  12. 12.917 − 139 =
  13. 13.? + 482 = 826
  14. 14.A train has 451 people in the front coaches and 337 people in the back coaches. How many people are on the train?
  15. 15.512 + 295 =
  16. 16.? + 857 = 957
  17. 17.916 − 557 =
  18. 18.325 − 129 =
  19. 19.? + 294 = 652
  20. 20.648 − 256 =
  21. 21.806 − 150 =
  22. 22.749 + 208 =
  23. 23.477 + 118 =
  24. 24.A school has 962 children. 260 of them are girls. How many boys are there?
  25. 25.A school has 758 children. 642 of them are girls. How many boys are there?
  26. 26.410 + 346 =
  27. 27.A school has 320 children. 107 of them are girls. How many boys are there?
  28. 28.A school has 747 children. 396 of them are girls. How many boys are there?
  29. 29.? + 141 = 578
  30. 30.222 + 363 =
  31. 31.558 + 377 =
  32. 32.A school has 332 children. 124 of them are girls. How many boys are there?
  33. 33.? − 181 = 215
  34. 34.772 − 165 =
  35. 35.A train has 819 people in the front coaches and 132 people in the back coaches. How many people are on the train?
  36. 36.A school has 442 children. 159 of them are girls. How many boys are there?
  37. 37.670 − 198 =
  38. 38.A school has 550 children. 412 of them are girls. How many boys are there?
  39. 39.A train has 512 people in the front coaches and 328 people in the back coaches. How many people are on the train?
  40. 40.A school has 533 children. 161 of them are girls. How many boys are there?

Answer key

  1. 229
  2. 154
  3. 429
  4. 820
  5. 323
  6. 362
  7. 438
  8. 449
  9. 38
  10. 250
  11. 597
  12. 778
  13. 344
  14. 788
  15. 807
  16. 100
  17. 359
  18. 196
  19. 358
  20. 392
  21. 656
  22. 957
  23. 595
  24. 702
  25. 116
  26. 756
  27. 213
  28. 351
  29. 437
  30. 585
  31. 935
  32. 208
  33. 396
  34. 607
  35. 951
  36. 283
  37. 472
  38. 138
  39. 840
  40. 372

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