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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 782 · 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. 1.623 + ? = 802
  2. 2.A school has 898 children. 584 of them are girls. How many boys are there?
  3. 3.649 − 292 =
  4. 4.? + 724 = 875
  5. 5.218 + 219 =
  6. 6.162 + 199 =
  7. 7.A train has 200 people in the front coaches and 547 people in the back coaches. How many people are on the train?
  8. 8.A train has 179 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  9. 9.211 − 151 =
  10. 10.A train has 124 people in the front coaches and 344 people in the back coaches. How many people are on the train?
  11. 11.440 − 137 =
  12. 12.? + 725 = 922
  13. 13.A school has 625 children. 376 of them are girls. How many boys are there?
  14. 14.A school has 771 children. 188 of them are girls. How many boys are there?
  15. 15.418 + 283 =
  16. 16.A train has 208 people in the front coaches and 170 people in the back coaches. How many people are on the train?
  17. 17.177 + 485 =
  18. 18.A school has 565 children. 335 of them are girls. How many boys are there?
  19. 19.820 − 635 =
  20. 20.251 + 182 =
  21. 21.165 + 133 =
  22. 22.285 + ? = 574
  23. 23.244 + 445 =
  24. 24.A train has 703 people in the front coaches and 285 people in the back coaches. How many people are on the train?
  25. 25.? + 545 = 665
  26. 26.714 + 284 =
  27. 27.203 + 508 =
  28. 28.881 − 462 =
  29. 29.A school has 284 children. 125 of them are girls. How many boys are there?
  30. 30.A school has 743 children. 353 of them are girls. How many boys are there?
  31. 31.? − 384 = 143
  32. 32.458 − 401 =
  33. 33.691 − 185 =
  34. 34.A train has 233 people in the front coaches and 573 people in the back coaches. How many people are on the train?
  35. 35.620 + ? = 756
  36. 36.A train has 412 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  37. 37.351 − 152 =
  38. 38.A train has 889 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  39. 39.A school has 906 children. 204 of them are girls. How many boys are there?
  40. 40.A school has 475 children. 389 of them are girls. How many boys are there?

Answer key

  1. 179
  2. 314
  3. 357
  4. 151
  5. 437
  6. 361
  7. 747
  8. 333
  9. 60
  10. 468
  11. 303
  12. 197
  13. 249
  14. 583
  15. 701
  16. 378
  17. 662
  18. 230
  19. 185
  20. 433
  21. 298
  22. 289
  23. 689
  24. 988
  25. 120
  26. 998
  27. 711
  28. 419
  29. 159
  30. 390
  31. 527
  32. 57
  33. 506
  34. 806
  35. 136
  36. 550
  37. 199
  38. 990
  39. 702
  40. 86

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