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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 586 · 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.A school has 496 children. 489 of them are girls. How many boys are there?
  2. 2.A train has 184 people in the front coaches and 393 people in the back coaches. How many people are on the train?
  3. 3.272 + 351 =
  4. 4.A train has 274 people in the front coaches and 352 people in the back coaches. How many people are on the train?
  5. 5.? + 178 = 562
  6. 6.A train has 217 people in the front coaches and 674 people in the back coaches. How many people are on the train?
  7. 7.A school has 955 children. 376 of them are girls. How many boys are there?
  8. 8.A train has 577 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  9. 9.564 + ? = 996
  10. 10.209 + ? = 627
  11. 11.? − 129 = 77
  12. 12.760 + 218 =
  13. 13.A school has 476 children. 337 of them are girls. How many boys are there?
  14. 14.649 − 574 =
  15. 15.A school has 729 children. 231 of them are girls. How many boys are there?
  16. 16.402 − 283 =
  17. 17.? − 361 = 566
  18. 18.A school has 723 children. 628 of them are girls. How many boys are there?
  19. 19.416 + ? = 816
  20. 20.980 − 201 =
  21. 21.751 − 302 =
  22. 22.259 − ? = 73
  23. 23.? + 147 = 963
  24. 24.474 − 408 =
  25. 25.552 − ? = 422
  26. 26.371 − 162 =
  27. 27.650 − 376 =
  28. 28.402 + 453 =
  29. 29.? + 492 = 676
  30. 30.905 − 529 =
  31. 31.? + 290 = 987
  32. 32.A train has 459 people in the front coaches and 467 people in the back coaches. How many people are on the train?
  33. 33.A school has 591 children. 292 of them are girls. How many boys are there?
  34. 34.A school has 618 children. 480 of them are girls. How many boys are there?
  35. 35.A school has 916 children. 806 of them are girls. How many boys are there?
  36. 36.392 + 504 =
  37. 37.A train has 585 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  38. 38.A train has 620 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  39. 39.A train has 877 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  40. 40.689 − ? = 587

Answer key

  1. 7
  2. 577
  3. 623
  4. 626
  5. 384
  6. 891
  7. 579
  8. 764
  9. 432
  10. 418
  11. 206
  12. 978
  13. 139
  14. 75
  15. 498
  16. 119
  17. 927
  18. 95
  19. 400
  20. 779
  21. 449
  22. 186
  23. 816
  24. 66
  25. 130
  26. 209
  27. 274
  28. 855
  29. 184
  30. 376
  31. 697
  32. 926
  33. 299
  34. 138
  35. 110
  36. 896
  37. 862
  38. 772
  39. 978
  40. 102

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