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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 480 · 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. 1.392 − 108 =
  2. 2.528 − 358 =
  3. 3.? + 740 = 944
  4. 4.A train has 438 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  5. 5.A school has 699 children. 146 of them are girls. How many boys are there?
  6. 6.882 + 104 =
  7. 7.306 − 205 =
  8. 8.A train has 561 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  9. 9.167 + 237 =
  10. 10.440 + ? = 983
  11. 11.A school has 605 children. 477 of them are girls. How many boys are there?
  12. 12.A school has 842 children. 659 of them are girls. How many boys are there?
  13. 13.A train has 631 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  14. 14.700 − 267 =
  15. 15.A train has 875 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  16. 16.841 + 146 =
  17. 17.A train has 482 people in the front coaches and 490 people in the back coaches. How many people are on the train?
  18. 18.873 + ? = 995
  19. 19.805 − ? = 530
  20. 20.468 + 485 =
  21. 21.100 + 537 =
  22. 22.544 − 491 =
  23. 23.206 + 669 =
  24. 24.A school has 329 children. 102 of them are girls. How many boys are there?
  25. 25.A school has 425 children. 238 of them are girls. How many boys are there?
  26. 26.? − 196 = 78
  27. 27.A school has 681 children. 487 of them are girls. How many boys are there?
  28. 28.A train has 833 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  29. 29.A train has 133 people in the front coaches and 484 people in the back coaches. How many people are on the train?
  30. 30.? + 386 = 714
  31. 31.? + 680 = 861
  32. 32.892 + ? = 998
  33. 33.A train has 853 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  34. 34.614 + 239 =
  35. 35.A school has 462 children. 332 of them are girls. How many boys are there?
  36. 36.789 + 130 =
  37. 37.416 + 177 =
  38. 38.795 + 182 =
  39. 39.239 − 222 =
  40. 40.A school has 746 children. 555 of them are girls. How many boys are there?

Answer key

  1. 284
  2. 170
  3. 204
  4. 546
  5. 553
  6. 986
  7. 101
  8. 801
  9. 404
  10. 543
  11. 128
  12. 183
  13. 785
  14. 433
  15. 976
  16. 987
  17. 972
  18. 122
  19. 275
  20. 953
  21. 637
  22. 53
  23. 875
  24. 227
  25. 187
  26. 274
  27. 194
  28. 959
  29. 617
  30. 328
  31. 181
  32. 106
  33. 989
  34. 853
  35. 130
  36. 919
  37. 593
  38. 977
  39. 17
  40. 191

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