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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 104 · 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. 1.424 − 229 =
  2. 2.? − 404 = 59
  3. 3.309 − 214 =
  4. 4.438 − 432 =
  5. 5.341 − 105 =
  6. 6.A school has 784 children. 516 of them are girls. How many boys are there?
  7. 7.? + 177 = 555
  8. 8.A train has 239 people in the front coaches and 619 people in the back coaches. How many people are on the train?
  9. 9.? − 363 = 108
  10. 10.A school has 365 children. 316 of them are girls. How many boys are there?
  11. 11.A train has 443 people in the front coaches and 335 people in the back coaches. How many people are on the train?
  12. 12.506 + 368 =
  13. 13.653 + 281 =
  14. 14.891 + 100 =
  15. 15.147 + 156 =
  16. 16.? − 236 = 181
  17. 17.807 − 132 =
  18. 18.? − 347 = 311
  19. 19.321 + 152 =
  20. 20.? − 590 = 73
  21. 21.A school has 640 children. 487 of them are girls. How many boys are there?
  22. 22.259 − ? = 105
  23. 23.293 − ? = 31
  24. 24.276 − 234 =
  25. 25.? + 550 = 891
  26. 26.A school has 290 children. 119 of them are girls. How many boys are there?
  27. 27.A train has 450 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  28. 28.710 − 408 =
  29. 29.937 − 752 =
  30. 30.A school has 701 children. 357 of them are girls. How many boys are there?
  31. 31.560 − 101 =
  32. 32.? + 494 = 683
  33. 33.A train has 876 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  34. 34.A train has 884 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  35. 35.A school has 894 children. 279 of them are girls. How many boys are there?
  36. 36.? − 632 = 157
  37. 37.849 + 132 =
  38. 38.A train has 262 people in the front coaches and 542 people in the back coaches. How many people are on the train?
  39. 39.A train has 202 people in the front coaches and 718 people in the back coaches. How many people are on the train?
  40. 40.A train has 565 people in the front coaches and 302 people in the back coaches. How many people are on the train?

Answer key

  1. 195
  2. 463
  3. 95
  4. 6
  5. 236
  6. 268
  7. 378
  8. 858
  9. 471
  10. 49
  11. 778
  12. 874
  13. 934
  14. 991
  15. 303
  16. 417
  17. 675
  18. 658
  19. 473
  20. 663
  21. 153
  22. 154
  23. 262
  24. 42
  25. 341
  26. 171
  27. 597
  28. 302
  29. 185
  30. 344
  31. 459
  32. 189
  33. 977
  34. 993
  35. 615
  36. 789
  37. 981
  38. 804
  39. 920
  40. 867

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