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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 574 · 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 257 children. 224 of them are girls. How many boys are there?
  2. 2.894 − ? = 718
  3. 3.A train has 673 people in the front coaches and 262 people in the back coaches. How many people are on the train?
  4. 4.239 − 221 =
  5. 5.? + 718 = 872
  6. 6.949 − 353 =
  7. 7.286 + 668 =
  8. 8.686 − 413 =
  9. 9.A train has 664 people in the front coaches and 135 people in the back coaches. How many people are on the train?
  10. 10.236 − 200 =
  11. 11.A train has 285 people in the front coaches and 358 people in the back coaches. How many people are on the train?
  12. 12.A train has 334 people in the front coaches and 218 people in the back coaches. How many people are on the train?
  13. 13.A school has 437 children. 285 of them are girls. How many boys are there?
  14. 14.A train has 263 people in the front coaches and 326 people in the back coaches. How many people are on the train?
  15. 15.463 + 207 =
  16. 16.A train has 198 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  17. 17.A train has 401 people in the front coaches and 564 people in the back coaches. How many people are on the train?
  18. 18.799 + 172 =
  19. 19.A train has 428 people in the front coaches and 357 people in the back coaches. How many people are on the train?
  20. 20.869 − ? = 729
  21. 21.558 + 213 =
  22. 22.A school has 296 children. 279 of them are girls. How many boys are there?
  23. 23.524 + 159 =
  24. 24.376 − ? = 91
  25. 25.685 + ? = 882
  26. 26.704 − 101 =
  27. 27.253 − 225 =
  28. 28.751 + 242 =
  29. 29.A school has 982 children. 349 of them are girls. How many boys are there?
  30. 30.A school has 421 children. 379 of them are girls. How many boys are there?
  31. 31.546 + 349 =
  32. 32.304 − 256 =
  33. 33.782 + ? = 922
  34. 34.349 − ? = 33
  35. 35.? − 205 = 487
  36. 36.392 + 138 =
  37. 37.? + 623 = 912
  38. 38.A train has 351 people in the front coaches and 307 people in the back coaches. How many people are on the train?
  39. 39.A train has 619 people in the front coaches and 323 people in the back coaches. How many people are on the train?
  40. 40.432 + ? = 829

Answer key

  1. 33
  2. 176
  3. 935
  4. 18
  5. 154
  6. 596
  7. 954
  8. 273
  9. 799
  10. 36
  11. 643
  12. 552
  13. 152
  14. 589
  15. 670
  16. 336
  17. 965
  18. 971
  19. 785
  20. 140
  21. 771
  22. 17
  23. 683
  24. 285
  25. 197
  26. 603
  27. 28
  28. 993
  29. 633
  30. 42
  31. 895
  32. 48
  33. 140
  34. 316
  35. 692
  36. 530
  37. 289
  38. 658
  39. 942
  40. 397

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