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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 63 · 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. 1.575 − 204 =
  2. 2.194 + ? = 900
  3. 3.A train has 621 people in the front coaches and 294 people in the back coaches. How many people are on the train?
  4. 4.756 + ? = 967
  5. 5.A school has 355 children. 335 of them are girls. How many boys are there?
  6. 6.A train has 853 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  7. 7.213 − ? = 84
  8. 8.525 − 157 =
  9. 9.572 + 258 =
  10. 10.? − 171 = 315
  11. 11.148 + 207 =
  12. 12.A train has 714 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  13. 13.A train has 115 people in the front coaches and 811 people in the back coaches. How many people are on the train?
  14. 14.? − 482 = 118
  15. 15.460 − 267 =
  16. 16.549 + 180 =
  17. 17.876 − ? = 384
  18. 18.A train has 103 people in the front coaches and 212 people in the back coaches. How many people are on the train?
  19. 19.147 + 752 =
  20. 20.840 + 138 =
  21. 21.426 − 335 =
  22. 22.? − 373 = 11
  23. 23.356 + 517 =
  24. 24.345 − 153 =
  25. 25.A train has 535 people in the front coaches and 424 people in the back coaches. How many people are on the train?
  26. 26.A train has 205 people in the front coaches and 352 people in the back coaches. How many people are on the train?
  27. 27.A school has 258 children. 249 of them are girls. How many boys are there?
  28. 28.189 + ? = 364
  29. 29.691 − 114 =
  30. 30.? − 480 = 419
  31. 31.424 + ? = 984
  32. 32.? − 250 = 477
  33. 33.A school has 514 children. 426 of them are girls. How many boys are there?
  34. 34.535 − 510 =
  35. 35.A school has 765 children. 145 of them are girls. How many boys are there?
  36. 36.A school has 676 children. 129 of them are girls. How many boys are there?
  37. 37.871 − 503 =
  38. 38.A train has 855 people in the front coaches and 140 people in the back coaches. How many people are on the train?
  39. 39.235 + ? = 795
  40. 40.A train has 213 people in the front coaches and 623 people in the back coaches. How many people are on the train?

Answer key

  1. 371
  2. 706
  3. 915
  4. 211
  5. 20
  6. 979
  7. 129
  8. 368
  9. 830
  10. 486
  11. 355
  12. 850
  13. 926
  14. 600
  15. 193
  16. 729
  17. 492
  18. 315
  19. 899
  20. 978
  21. 91
  22. 384
  23. 873
  24. 192
  25. 959
  26. 557
  27. 9
  28. 175
  29. 577
  30. 899
  31. 560
  32. 727
  33. 88
  34. 25
  35. 620
  36. 547
  37. 368
  38. 995
  39. 560
  40. 836

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