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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 594 · 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 200 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  2. 2.586 − 390 =
  3. 3.A school has 322 children. 104 of them are girls. How many boys are there?
  4. 4.A school has 613 children. 103 of them are girls. How many boys are there?
  5. 5.714 + ? = 842
  6. 6.? − 474 = 514
  7. 7.A school has 874 children. 663 of them are girls. How many boys are there?
  8. 8.A train has 309 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  9. 9.A school has 268 children. 212 of them are girls. How many boys are there?
  10. 10.A train has 615 people in the front coaches and 145 people in the back coaches. How many people are on the train?
  11. 11.862 − 174 =
  12. 12.904 − 840 =
  13. 13.446 − ? = 287
  14. 14.355 + 326 =
  15. 15.? + 361 = 771
  16. 16.267 − 208 =
  17. 17.301 + 117 =
  18. 18.762 + 117 =
  19. 19.A school has 755 children. 352 of them are girls. How many boys are there?
  20. 20.A school has 702 children. 491 of them are girls. How many boys are there?
  21. 21.377 − ? = 66
  22. 22.248 + 128 =
  23. 23.977 − ? = 319
  24. 24.669 − 244 =
  25. 25.800 + 168 =
  26. 26.206 + ? = 513
  27. 27.356 − ? = 38
  28. 28.A school has 266 children. 223 of them are girls. How many boys are there?
  29. 29.646 − 508 =
  30. 30.A school has 404 children. 254 of them are girls. How many boys are there?
  31. 31.A school has 627 children. 411 of them are girls. How many boys are there?
  32. 32.A train has 156 people in the front coaches and 181 people in the back coaches. How many people are on the train?
  33. 33.? + 181 = 519
  34. 34.619 + ? = 788
  35. 35.330 − 158 =
  36. 36.276 − ? = 146
  37. 37.A school has 574 children. 430 of them are girls. How many boys are there?
  38. 38.A train has 797 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  39. 39.376 + 125 =
  40. 40.131 + ? = 612

Answer key

  1. 355
  2. 196
  3. 218
  4. 510
  5. 128
  6. 988
  7. 211
  8. 432
  9. 56
  10. 760
  11. 688
  12. 64
  13. 159
  14. 681
  15. 410
  16. 59
  17. 418
  18. 879
  19. 403
  20. 211
  21. 311
  22. 376
  23. 658
  24. 425
  25. 968
  26. 307
  27. 318
  28. 43
  29. 138
  30. 150
  31. 216
  32. 337
  33. 338
  34. 169
  35. 172
  36. 130
  37. 144
  38. 948
  39. 501
  40. 481

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