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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 65 · 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 train has 815 people in the front coaches and 131 people in the back coaches. How many people are on the train?
  2. 2.A train has 110 people in the front coaches and 726 people in the back coaches. How many people are on the train?
  3. 3.? − 398 = 600
  4. 4.799 − 646 =
  5. 5.376 + ? = 636
  6. 6.A train has 423 people in the front coaches and 350 people in the back coaches. How many people are on the train?
  7. 7.A train has 188 people in the front coaches and 478 people in the back coaches. How many people are on the train?
  8. 8.? + 142 = 720
  9. 9.569 + 250 =
  10. 10.? − 525 = 139
  11. 11.? + 862 = 995
  12. 12.A school has 738 children. 115 of them are girls. How many boys are there?
  13. 13.? − 102 = 605
  14. 14.? + 257 = 507
  15. 15.146 + 833 =
  16. 16.257 + ? = 460
  17. 17.? + 742 = 999
  18. 18.767 + 182 =
  19. 19.? − 424 = 125
  20. 20.A train has 252 people in the front coaches and 657 people in the back coaches. How many people are on the train?
  21. 21.101 + 400 =
  22. 22.294 + 393 =
  23. 23.A school has 693 children. 645 of them are girls. How many boys are there?
  24. 24.A school has 542 children. 248 of them are girls. How many boys are there?
  25. 25.? + 809 = 986
  26. 26.378 − 262 =
  27. 27.A train has 817 people in the front coaches and 178 people in the back coaches. How many people are on the train?
  28. 28.A school has 594 children. 545 of them are girls. How many boys are there?
  29. 29.A train has 671 people in the front coaches and 243 people in the back coaches. How many people are on the train?
  30. 30.404 + 506 =
  31. 31.659 − ? = 132
  32. 32.A school has 541 children. 360 of them are girls. How many boys are there?
  33. 33.383 + 120 =
  34. 34.? − 172 = 164
  35. 35.A school has 679 children. 443 of them are girls. How many boys are there?
  36. 36.197 + 419 =
  37. 37.982 − 197 =
  38. 38.776 − 412 =
  39. 39.A train has 472 people in the front coaches and 398 people in the back coaches. How many people are on the train?
  40. 40.A train has 401 people in the front coaches and 315 people in the back coaches. How many people are on the train?

Answer key

  1. 946
  2. 836
  3. 998
  4. 153
  5. 260
  6. 773
  7. 666
  8. 578
  9. 819
  10. 664
  11. 133
  12. 623
  13. 707
  14. 250
  15. 979
  16. 203
  17. 257
  18. 949
  19. 549
  20. 909
  21. 501
  22. 687
  23. 48
  24. 294
  25. 177
  26. 116
  27. 995
  28. 49
  29. 914
  30. 910
  31. 527
  32. 181
  33. 503
  34. 336
  35. 236
  36. 616
  37. 785
  38. 364
  39. 870
  40. 716

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