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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 56 · 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. 1.443 − 218 =
  2. 2.256 − 169 =
  3. 3.378 + 501 =
  4. 4.160 + 244 =
  5. 5.A train has 781 people in the front coaches and 200 people in the back coaches. How many people are on the train?
  6. 6.134 + 630 =
  7. 7.750 + ? = 930
  8. 8.A train has 485 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  9. 9.649 − 341 =
  10. 10.? + 125 = 861
  11. 11.601 + 349 =
  12. 12.? + 575 = 827
  13. 13.? − 567 = 129
  14. 14.A train has 209 people in the front coaches and 417 people in the back coaches. How many people are on the train?
  15. 15.438 + ? = 891
  16. 16.407 − 110 =
  17. 17.A school has 938 children. 254 of them are girls. How many boys are there?
  18. 18.A train has 341 people in the front coaches and 306 people in the back coaches. How many people are on the train?
  19. 19.399 + 191 =
  20. 20.? − 170 = 134
  21. 21.A school has 270 children. 252 of them are girls. How many boys are there?
  22. 22.290 + 503 =
  23. 23.? − 292 = 76
  24. 24.265 − 254 =
  25. 25.637 + 160 =
  26. 26.A school has 995 children. 663 of them are girls. How many boys are there?
  27. 27.466 − 456 =
  28. 28.926 − ? = 272
  29. 29.814 − 503 =
  30. 30.A train has 638 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  31. 31.A train has 269 people in the front coaches and 405 people in the back coaches. How many people are on the train?
  32. 32.102 + ? = 598
  33. 33.299 − 156 =
  34. 34.? + 400 = 994
  35. 35.? − 663 = 195
  36. 36.A train has 874 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  37. 37.297 − ? = 58
  38. 38.A school has 409 children. 182 of them are girls. How many boys are there?
  39. 39.A train has 342 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  40. 40.A train has 569 people in the front coaches and 290 people in the back coaches. How many people are on the train?

Answer key

  1. 225
  2. 87
  3. 879
  4. 404
  5. 981
  6. 764
  7. 180
  8. 698
  9. 308
  10. 736
  11. 950
  12. 252
  13. 696
  14. 626
  15. 453
  16. 297
  17. 684
  18. 647
  19. 590
  20. 304
  21. 18
  22. 793
  23. 368
  24. 11
  25. 797
  26. 332
  27. 10
  28. 654
  29. 311
  30. 806
  31. 674
  32. 496
  33. 143
  34. 594
  35. 858
  36. 978
  37. 239
  38. 227
  39. 443
  40. 859

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