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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 602 · 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. 1.868 − 615 =
  2. 2.417 − ? = 14
  3. 3.874 − 257 =
  4. 4.A train has 880 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  5. 5.? − 477 = 6
  6. 6.816 + 137 =
  7. 7.A train has 536 people in the front coaches and 291 people in the back coaches. How many people are on the train?
  8. 8.? + 548 = 930
  9. 9.248 − 115 =
  10. 10.? − 457 = 485
  11. 11.? + 258 = 380
  12. 12.522 + 308 =
  13. 13.A train has 270 people in the front coaches and 602 people in the back coaches. How many people are on the train?
  14. 14.587 + 131 =
  15. 15.556 + 339 =
  16. 16.506 + 109 =
  17. 17.269 + 623 =
  18. 18.? + 201 = 393
  19. 19.953 − 330 =
  20. 20.879 − 234 =
  21. 21.511 − 335 =
  22. 22.141 + 524 =
  23. 23.174 + 528 =
  24. 24.A school has 334 children. 198 of them are girls. How many boys are there?
  25. 25.152 + 660 =
  26. 26.? − 420 = 314
  27. 27.481 + ? = 822
  28. 28.528 + 307 =
  29. 29.A train has 886 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  30. 30.591 + 268 =
  31. 31.A train has 525 people in the front coaches and 260 people in the back coaches. How many people are on the train?
  32. 32.227 − 222 =
  33. 33.? − 910 = 58
  34. 34.A school has 351 children. 215 of them are girls. How many boys are there?
  35. 35.A train has 493 people in the front coaches and 503 people in the back coaches. How many people are on the train?
  36. 36.458 + 482 =
  37. 37.A train has 487 people in the front coaches and 315 people in the back coaches. How many people are on the train?
  38. 38.A school has 218 children. 208 of them are girls. How many boys are there?
  39. 39.749 − 207 =
  40. 40.A school has 989 children. 266 of them are girls. How many boys are there?

Answer key

  1. 253
  2. 403
  3. 617
  4. 982
  5. 483
  6. 953
  7. 827
  8. 382
  9. 133
  10. 942
  11. 122
  12. 830
  13. 872
  14. 718
  15. 895
  16. 615
  17. 892
  18. 192
  19. 623
  20. 645
  21. 176
  22. 665
  23. 702
  24. 136
  25. 812
  26. 734
  27. 341
  28. 835
  29. 996
  30. 859
  31. 785
  32. 5
  33. 968
  34. 136
  35. 996
  36. 940
  37. 802
  38. 10
  39. 542
  40. 723

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