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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 64 · 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. 1.560 + 376 =
  2. 2.A train has 657 people in the front coaches and 244 people in the back coaches. How many people are on the train?
  3. 3.? + 594 = 761
  4. 4.165 + ? = 651
  5. 5.A train has 723 people in the front coaches and 264 people in the back coaches. How many people are on the train?
  6. 6.A train has 512 people in the front coaches and 287 people in the back coaches. How many people are on the train?
  7. 7.419 − ? = 159
  8. 8.? + 740 = 902
  9. 9.659 + 177 =
  10. 10.169 + ? = 968
  11. 11.A train has 306 people in the front coaches and 460 people in the back coaches. How many people are on the train?
  12. 12.? + 336 = 660
  13. 13.608 + 271 =
  14. 14.616 − 118 =
  15. 15.387 − ? = 15
  16. 16.439 + 295 =
  17. 17.A school has 225 children. 217 of them are girls. How many boys are there?
  18. 18.A train has 364 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  19. 19.143 + ? = 940
  20. 20.873 + 100 =
  21. 21.? − 231 = 61
  22. 22.? − 139 = 179
  23. 23.515 − 467 =
  24. 24.427 − 325 =
  25. 25.820 + ? = 992
  26. 26.A train has 173 people in the front coaches and 692 people in the back coaches. How many people are on the train?
  27. 27.746 + ? = 970
  28. 28.244 + ? = 678
  29. 29.A train has 460 people in the front coaches and 481 people in the back coaches. How many people are on the train?
  30. 30.342 + 588 =
  31. 31.A school has 437 children. 357 of them are girls. How many boys are there?
  32. 32.636 + ? = 745
  33. 33.? + 523 = 699
  34. 34.A train has 648 people in the front coaches and 140 people in the back coaches. How many people are on the train?
  35. 35.302 − ? = 11
  36. 36.291 − 219 =
  37. 37.429 − 364 =
  38. 38.325 + 120 =
  39. 39.A train has 216 people in the front coaches and 728 people in the back coaches. How many people are on the train?
  40. 40.825 − 486 =

Answer key

  1. 936
  2. 901
  3. 167
  4. 486
  5. 987
  6. 799
  7. 260
  8. 162
  9. 836
  10. 799
  11. 766
  12. 324
  13. 879
  14. 498
  15. 372
  16. 734
  17. 8
  18. 465
  19. 797
  20. 973
  21. 292
  22. 318
  23. 48
  24. 102
  25. 172
  26. 865
  27. 224
  28. 434
  29. 941
  30. 930
  31. 80
  32. 109
  33. 176
  34. 788
  35. 291
  36. 72
  37. 65
  38. 445
  39. 944
  40. 339

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