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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 719 · 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. 1.830 − 214 =
  2. 2.A train has 806 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  3. 3.813 − ? = 485
  4. 4.A school has 813 children. 299 of them are girls. How many boys are there?
  5. 5.A school has 562 children. 315 of them are girls. How many boys are there?
  6. 6.161 + 580 =
  7. 7.791 + ? = 970
  8. 8.715 − 259 =
  9. 9.A train has 510 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  10. 10.A school has 625 children. 249 of them are girls. How many boys are there?
  11. 11.843 − ? = 53
  12. 12.201 + ? = 482
  13. 13.A train has 537 people in the front coaches and 258 people in the back coaches. How many people are on the train?
  14. 14.A train has 761 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  15. 15.492 − ? = 169
  16. 16.751 + ? = 889
  17. 17.? − 226 = 147
  18. 18.A school has 675 children. 147 of them are girls. How many boys are there?
  19. 19.A train has 386 people in the front coaches and 406 people in the back coaches. How many people are on the train?
  20. 20.943 − 563 =
  21. 21.524 − 420 =
  22. 22.? − 694 = 241
  23. 23.429 − 399 =
  24. 24.A train has 296 people in the front coaches and 227 people in the back coaches. How many people are on the train?
  25. 25.? + 282 = 831
  26. 26.A school has 441 children. 148 of them are girls. How many boys are there?
  27. 27.274 + 480 =
  28. 28.509 + ? = 773
  29. 29.166 + ? = 851
  30. 30.503 − 158 =
  31. 31.535 + 446 =
  32. 32.A school has 608 children. 302 of them are girls. How many boys are there?
  33. 33.204 − ? = 13
  34. 34.A school has 973 children. 185 of them are girls. How many boys are there?
  35. 35.852 + 121 =
  36. 36.A school has 908 children. 903 of them are girls. How many boys are there?
  37. 37.A train has 107 people in the front coaches and 670 people in the back coaches. How many people are on the train?
  38. 38.A train has 699 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  39. 39.? + 134 = 551
  40. 40.641 + 115 =

Answer key

  1. 616
  2. 945
  3. 328
  4. 514
  5. 247
  6. 741
  7. 179
  8. 456
  9. 646
  10. 376
  11. 790
  12. 281
  13. 795
  14. 916
  15. 323
  16. 138
  17. 373
  18. 528
  19. 792
  20. 380
  21. 104
  22. 935
  23. 30
  24. 523
  25. 549
  26. 293
  27. 754
  28. 264
  29. 685
  30. 345
  31. 981
  32. 306
  33. 191
  34. 788
  35. 973
  36. 5
  37. 777
  38. 825
  39. 417
  40. 756

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