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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 318 · 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. 1.873 − ? = 592
  2. 2.A train has 355 people in the front coaches and 444 people in the back coaches. How many people are on the train?
  3. 3.261 − 259 =
  4. 4.488 − 433 =
  5. 5.? − 297 = 188
  6. 6.340 + 138 =
  7. 7.226 + 219 =
  8. 8.132 + 808 =
  9. 9.A train has 682 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  10. 10.479 + 454 =
  11. 11.A school has 769 children. 474 of them are girls. How many boys are there?
  12. 12.718 + 150 =
  13. 13.433 − ? = 93
  14. 14.307 + 644 =
  15. 15.A school has 239 children. 106 of them are girls. How many boys are there?
  16. 16.A train has 371 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  17. 17.224 + 351 =
  18. 18.881 + ? = 997
  19. 19.A school has 407 children. 227 of them are girls. How many boys are there?
  20. 20.325 − 158 =
  21. 21.291 + 327 =
  22. 22.? − 550 = 357
  23. 23.A school has 826 children. 466 of them are girls. How many boys are there?
  24. 24.? + 622 = 812
  25. 25.367 − ? = 61
  26. 26.A train has 396 people in the front coaches and 540 people in the back coaches. How many people are on the train?
  27. 27.797 + 143 =
  28. 28.287 + 630 =
  29. 29.319 + 521 =
  30. 30.371 + ? = 797
  31. 31.A train has 268 people in the front coaches and 652 people in the back coaches. How many people are on the train?
  32. 32.473 − 307 =
  33. 33.A school has 711 children. 599 of them are girls. How many boys are there?
  34. 34.507 + ? = 702
  35. 35.? − 215 = 260
  36. 36.572 − 392 =
  37. 37.640 + 126 =
  38. 38.? − 156 = 581
  39. 39.A train has 686 people in the front coaches and 294 people in the back coaches. How many people are on the train?
  40. 40.414 − 366 =

Answer key

  1. 281
  2. 799
  3. 2
  4. 55
  5. 485
  6. 478
  7. 445
  8. 940
  9. 783
  10. 933
  11. 295
  12. 868
  13. 340
  14. 951
  15. 133
  16. 558
  17. 575
  18. 116
  19. 180
  20. 167
  21. 618
  22. 907
  23. 360
  24. 190
  25. 306
  26. 936
  27. 940
  28. 917
  29. 840
  30. 426
  31. 920
  32. 166
  33. 112
  34. 195
  35. 475
  36. 180
  37. 766
  38. 737
  39. 980
  40. 48

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