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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 252 · 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 train has 437 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  2. 2.885 − ? = 683
  3. 3.? − 217 = 94
  4. 4.323 − 104 =
  5. 5.A school has 282 children. 209 of them are girls. How many boys are there?
  6. 6.A school has 863 children. 340 of them are girls. How many boys are there?
  7. 7.A school has 912 children. 221 of them are girls. How many boys are there?
  8. 8.A train has 128 people in the front coaches and 276 people in the back coaches. How many people are on the train?
  9. 9.705 + ? = 982
  10. 10.632 + ? = 905
  11. 11.438 − ? = 202
  12. 12.? − 533 = 234
  13. 13.A school has 519 children. 360 of them are girls. How many boys are there?
  14. 14.899 − 451 =
  15. 15.? − 515 = 55
  16. 16.498 − 482 =
  17. 17.178 + 592 =
  18. 18.697 + 154 =
  19. 19.A school has 652 children. 179 of them are girls. How many boys are there?
  20. 20.449 − ? = 270
  21. 21.A school has 824 children. 687 of them are girls. How many boys are there?
  22. 22.179 + 736 =
  23. 23.368 + 398 =
  24. 24.A train has 100 people in the front coaches and 364 people in the back coaches. How many people are on the train?
  25. 25.120 + ? = 286
  26. 26.175 + 519 =
  27. 27.358 − 253 =
  28. 28.A train has 428 people in the front coaches and 428 people in the back coaches. How many people are on the train?
  29. 29.533 − ? = 392
  30. 30.A train has 558 people in the front coaches and 346 people in the back coaches. How many people are on the train?
  31. 31.A train has 429 people in the front coaches and 291 people in the back coaches. How many people are on the train?
  32. 32.A train has 844 people in the front coaches and 137 people in the back coaches. How many people are on the train?
  33. 33.236 − 163 =
  34. 34.115 + 264 =
  35. 35.? − 158 = 541
  36. 36.A school has 321 children. 307 of them are girls. How many boys are there?
  37. 37.867 + 107 =
  38. 38.A school has 832 children. 571 of them are girls. How many boys are there?
  39. 39.? − 241 = 730
  40. 40.A train has 747 people in the front coaches and 118 people in the back coaches. How many people are on the train?

Answer key

  1. 562
  2. 202
  3. 311
  4. 219
  5. 73
  6. 523
  7. 691
  8. 404
  9. 277
  10. 273
  11. 236
  12. 767
  13. 159
  14. 448
  15. 570
  16. 16
  17. 770
  18. 851
  19. 473
  20. 179
  21. 137
  22. 915
  23. 766
  24. 464
  25. 166
  26. 694
  27. 105
  28. 856
  29. 141
  30. 904
  31. 720
  32. 981
  33. 73
  34. 379
  35. 699
  36. 14
  37. 974
  38. 261
  39. 971
  40. 865

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