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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 322 · 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. 1.211 − ? = 107
  2. 2.? − 405 = 61
  3. 3.665 − 470 =
  4. 4.470 + 473 =
  5. 5.786 + 142 =
  6. 6.750 − ? = 579
  7. 7.819 + ? = 952
  8. 8.464 − 213 =
  9. 9.? − 259 = 374
  10. 10.863 − 142 =
  11. 11.339 − ? = 48
  12. 12.A train has 301 people in the front coaches and 292 people in the back coaches. How many people are on the train?
  13. 13.A school has 955 children. 838 of them are girls. How many boys are there?
  14. 14.725 + 138 =
  15. 15.456 + 158 =
  16. 16.A school has 647 children. 353 of them are girls. How many boys are there?
  17. 17.A school has 616 children. 102 of them are girls. How many boys are there?
  18. 18.? + 226 = 905
  19. 19.908 − 729 =
  20. 20.A school has 988 children. 318 of them are girls. How many boys are there?
  21. 21.A train has 294 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  22. 22.346 − 200 =
  23. 23.963 − 265 =
  24. 24.343 − 109 =
  25. 25.279 + 205 =
  26. 26.422 − 107 =
  27. 27.A train has 231 people in the front coaches and 658 people in the back coaches. How many people are on the train?
  28. 28.A school has 776 children. 341 of them are girls. How many boys are there?
  29. 29.485 + ? = 986
  30. 30.922 − ? = 316
  31. 31.? + 582 = 847
  32. 32.? − 462 = 30
  33. 33.? + 256 = 657
  34. 34.766 − ? = 300
  35. 35.? − 150 = 470
  36. 36.? − 506 = 175
  37. 37.A train has 199 people in the front coaches and 692 people in the back coaches. How many people are on the train?
  38. 38.A school has 480 children. 313 of them are girls. How many boys are there?
  39. 39.A train has 794 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  40. 40.773 − 455 =

Answer key

  1. 104
  2. 466
  3. 195
  4. 943
  5. 928
  6. 171
  7. 133
  8. 251
  9. 633
  10. 721
  11. 291
  12. 593
  13. 117
  14. 863
  15. 614
  16. 294
  17. 514
  18. 679
  19. 179
  20. 670
  21. 432
  22. 146
  23. 698
  24. 234
  25. 484
  26. 315
  27. 889
  28. 435
  29. 501
  30. 606
  31. 265
  32. 492
  33. 401
  34. 466
  35. 620
  36. 681
  37. 891
  38. 167
  39. 907
  40. 318

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