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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 92 · 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.? + 696 = 850
  2. 2.728 + 131 =
  3. 3.A school has 630 children. 246 of them are girls. How many boys are there?
  4. 4.761 + 114 =
  5. 5.A train has 735 people in the front coaches and 241 people in the back coaches. How many people are on the train?
  6. 6.497 + ? = 726
  7. 7.432 − 117 =
  8. 8.116 + ? = 252
  9. 9.A school has 293 children. 273 of them are girls. How many boys are there?
  10. 10.A train has 200 people in the front coaches and 577 people in the back coaches. How many people are on the train?
  11. 11.639 + 189 =
  12. 12.A school has 242 children. 202 of them are girls. How many boys are there?
  13. 13.395 + 489 =
  14. 14.808 − 321 =
  15. 15.619 + 123 =
  16. 16.762 − ? = 311
  17. 17.? − 188 = 437
  18. 18.223 − ? = 122
  19. 19.A school has 440 children. 426 of them are girls. How many boys are there?
  20. 20.A school has 643 children. 535 of them are girls. How many boys are there?
  21. 21.? + 650 = 995
  22. 22.247 − ? = 146
  23. 23.170 + ? = 716
  24. 24.? + 204 = 561
  25. 25.? − 365 = 447
  26. 26.479 − ? = 107
  27. 27.A train has 716 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  28. 28.339 + ? = 668
  29. 29.869 + 107 =
  30. 30.929 − 100 =
  31. 31.A train has 411 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  32. 32.305 + ? = 811
  33. 33.? + 216 = 764
  34. 34.345 + 635 =
  35. 35.116 + 414 =
  36. 36.? − 108 = 415
  37. 37.A train has 188 people in the front coaches and 519 people in the back coaches. How many people are on the train?
  38. 38.? − 538 = 91
  39. 39.? − 571 = 408
  40. 40.431 − ? = 249

Answer key

  1. 154
  2. 859
  3. 384
  4. 875
  5. 976
  6. 229
  7. 315
  8. 136
  9. 20
  10. 777
  11. 828
  12. 40
  13. 884
  14. 487
  15. 742
  16. 451
  17. 625
  18. 101
  19. 14
  20. 108
  21. 345
  22. 101
  23. 546
  24. 357
  25. 812
  26. 372
  27. 860
  28. 329
  29. 976
  30. 829
  31. 613
  32. 506
  33. 548
  34. 980
  35. 530
  36. 523
  37. 707
  38. 629
  39. 979
  40. 182

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