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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 533 · 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.? − 333 = 618
  2. 2.772 + 131 =
  3. 3.A train has 299 people in the front coaches and 431 people in the back coaches. How many people are on the train?
  4. 4.A school has 412 children. 186 of them are girls. How many boys are there?
  5. 5.A train has 432 people in the front coaches and 564 people in the back coaches. How many people are on the train?
  6. 6.? + 356 = 706
  7. 7.? − 149 = 279
  8. 8.275 − 164 =
  9. 9.A school has 605 children. 234 of them are girls. How many boys are there?
  10. 10.575 + 280 =
  11. 11.451 + 421 =
  12. 12.168 + 208 =
  13. 13.A school has 213 children. 131 of them are girls. How many boys are there?
  14. 14.? − 271 = 403
  15. 15.130 + 278 =
  16. 16.901 − 456 =
  17. 17.A train has 232 people in the front coaches and 647 people in the back coaches. How many people are on the train?
  18. 18.747 − ? = 404
  19. 19.292 − ? = 91
  20. 20.286 + 377 =
  21. 21.A school has 310 children. 122 of them are girls. How many boys are there?
  22. 22.A train has 451 people in the front coaches and 163 people in the back coaches. How many people are on the train?
  23. 23.204 − 167 =
  24. 24.A train has 315 people in the front coaches and 505 people in the back coaches. How many people are on the train?
  25. 25.A school has 920 children. 611 of them are girls. How many boys are there?
  26. 26.A train has 818 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  27. 27.585 − 412 =
  28. 28.579 − ? = 357
  29. 29.609 − 485 =
  30. 30.307 − 227 =
  31. 31.500 + 214 =
  32. 32.? − 269 = 305
  33. 33.? − 601 = 279
  34. 34.A school has 465 children. 441 of them are girls. How many boys are there?
  35. 35.A train has 618 people in the front coaches and 192 people in the back coaches. How many people are on the train?
  36. 36.441 − 117 =
  37. 37.667 − ? = 453
  38. 38.604 − 126 =
  39. 39.? + 444 = 910
  40. 40.111 + 628 =

Answer key

  1. 951
  2. 903
  3. 730
  4. 226
  5. 996
  6. 350
  7. 428
  8. 111
  9. 371
  10. 855
  11. 872
  12. 376
  13. 82
  14. 674
  15. 408
  16. 445
  17. 879
  18. 343
  19. 201
  20. 663
  21. 188
  22. 614
  23. 37
  24. 820
  25. 309
  26. 931
  27. 173
  28. 222
  29. 124
  30. 80
  31. 714
  32. 574
  33. 880
  34. 24
  35. 810
  36. 324
  37. 214
  38. 478
  39. 466
  40. 739

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