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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 808 · 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.? − 231 = 544
  2. 2.890 − 291 =
  3. 3.? − 271 = 323
  4. 4.370 + 586 =
  5. 5.214 − 133 =
  6. 6.? − 130 = 221
  7. 7.318 + ? = 949
  8. 8.A school has 242 children. 110 of them are girls. How many boys are there?
  9. 9.? + 246 = 656
  10. 10.A school has 635 children. 128 of them are girls. How many boys are there?
  11. 11.191 + 439 =
  12. 12.? + 698 = 850
  13. 13.A school has 906 children. 530 of them are girls. How many boys are there?
  14. 14.740 − 262 =
  15. 15.A school has 800 children. 618 of them are girls. How many boys are there?
  16. 16.617 − 204 =
  17. 17.? + 584 = 763
  18. 18.? + 291 = 878
  19. 19.521 + 353 =
  20. 20.A train has 310 people in the front coaches and 626 people in the back coaches. How many people are on the train?
  21. 21.227 − 104 =
  22. 22.A train has 857 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  23. 23.? − 703 = 65
  24. 24.? + 723 = 949
  25. 25.A train has 236 people in the front coaches and 307 people in the back coaches. How many people are on the train?
  26. 26.638 − 536 =
  27. 27.428 − 230 =
  28. 28.A school has 629 children. 461 of them are girls. How many boys are there?
  29. 29.A school has 418 children. 345 of them are girls. How many boys are there?
  30. 30.397 + ? = 535
  31. 31.853 − 557 =
  32. 32.775 + ? = 955
  33. 33.A school has 303 children. 215 of them are girls. How many boys are there?
  34. 34.A school has 295 children. 206 of them are girls. How many boys are there?
  35. 35.283 + 448 =
  36. 36.A train has 740 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  37. 37.416 + 148 =
  38. 38.297 + 353 =
  39. 39.244 + 517 =
  40. 40.A train has 767 people in the front coaches and 203 people in the back coaches. How many people are on the train?

Answer key

  1. 775
  2. 599
  3. 594
  4. 956
  5. 81
  6. 351
  7. 631
  8. 132
  9. 410
  10. 507
  11. 630
  12. 152
  13. 376
  14. 478
  15. 182
  16. 413
  17. 179
  18. 587
  19. 874
  20. 936
  21. 123
  22. 977
  23. 768
  24. 226
  25. 543
  26. 102
  27. 198
  28. 168
  29. 73
  30. 138
  31. 296
  32. 180
  33. 88
  34. 89
  35. 731
  36. 888
  37. 564
  38. 650
  39. 761
  40. 970

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