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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 303 · 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. 1.108 + ? = 694
  2. 2.A train has 349 people in the front coaches and 635 people in the back coaches. How many people are on the train?
  3. 3.401 − ? = 164
  4. 4.? + 179 = 505
  5. 5.361 + 437 =
  6. 6.? + 822 = 982
  7. 7.A train has 579 people in the front coaches and 289 people in the back coaches. How many people are on the train?
  8. 8.131 + 617 =
  9. 9.A train has 866 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  10. 10.387 + 165 =
  11. 11.A train has 458 people in the front coaches and 315 people in the back coaches. How many people are on the train?
  12. 12.644 − 256 =
  13. 13.422 + 161 =
  14. 14.351 + 178 =
  15. 15.A school has 518 children. 281 of them are girls. How many boys are there?
  16. 16.A train has 214 people in the front coaches and 278 people in the back coaches. How many people are on the train?
  17. 17.164 + 674 =
  18. 18.698 − 607 =
  19. 19.A train has 644 people in the front coaches and 268 people in the back coaches. How many people are on the train?
  20. 20.A school has 720 children. 139 of them are girls. How many boys are there?
  21. 21.496 + ? = 786
  22. 22.? − 218 = 475
  23. 23.A train has 286 people in the front coaches and 643 people in the back coaches. How many people are on the train?
  24. 24.? + 291 = 697
  25. 25.? − 289 = 81
  26. 26.575 + 262 =
  27. 27.? + 298 = 944
  28. 28.A school has 383 children. 382 of them are girls. How many boys are there?
  29. 29.725 − 620 =
  30. 30.186 + ? = 382
  31. 31.409 + 401 =
  32. 32.? − 118 = 82
  33. 33.590 − 315 =
  34. 34.303 + ? = 913
  35. 35.A train has 568 people in the front coaches and 348 people in the back coaches. How many people are on the train?
  36. 36.840 − 118 =
  37. 37.411 − ? = 137
  38. 38.A train has 276 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  39. 39.? − 275 = 38
  40. 40.311 + 237 =

Answer key

  1. 586
  2. 984
  3. 237
  4. 326
  5. 798
  6. 160
  7. 868
  8. 748
  9. 985
  10. 552
  11. 773
  12. 388
  13. 583
  14. 529
  15. 237
  16. 492
  17. 838
  18. 91
  19. 912
  20. 581
  21. 290
  22. 693
  23. 929
  24. 406
  25. 370
  26. 837
  27. 646
  28. 1
  29. 105
  30. 196
  31. 810
  32. 200
  33. 275
  34. 610
  35. 916
  36. 722
  37. 274
  38. 435
  39. 313
  40. 548

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