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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 725 · 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. 1.205 − 110 =
  2. 2.? + 533 = 736
  3. 3.A school has 356 children. 290 of them are girls. How many boys are there?
  4. 4.121 + ? = 404
  5. 5.A train has 824 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  6. 6.407 − 135 =
  7. 7.A train has 333 people in the front coaches and 458 people in the back coaches. How many people are on the train?
  8. 8.787 + 206 =
  9. 9.A train has 286 people in the front coaches and 489 people in the back coaches. How many people are on the train?
  10. 10.? − 420 = 220
  11. 11.A school has 969 children. 446 of them are girls. How many boys are there?
  12. 12.A train has 870 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  13. 13.? − 238 = 228
  14. 14.551 − 148 =
  15. 15.A school has 750 children. 162 of them are girls. How many boys are there?
  16. 16.727 − ? = 487
  17. 17.966 − 965 =
  18. 18.467 + ? = 676
  19. 19.? − 260 = 20
  20. 20.A school has 542 children. 220 of them are girls. How many boys are there?
  21. 21.463 − ? = 31
  22. 22.849 − 562 =
  23. 23.? − 774 = 189
  24. 24.302 − ? = 10
  25. 25.257 − 135 =
  26. 26.282 + ? = 741
  27. 27.A train has 762 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  28. 28.460 + 187 =
  29. 29.? + 488 = 876
  30. 30.633 − ? = 68
  31. 31.269 − 205 =
  32. 32.800 − ? = 380
  33. 33.335 − 110 =
  34. 34.A school has 200 children. 182 of them are girls. How many boys are there?
  35. 35.184 + 785 =
  36. 36.590 − ? = 8
  37. 37.A train has 759 people in the front coaches and 160 people in the back coaches. How many people are on the train?
  38. 38.A train has 564 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  39. 39.836 + 148 =
  40. 40.A school has 519 children. 262 of them are girls. How many boys are there?

Answer key

  1. 95
  2. 203
  3. 66
  4. 283
  5. 979
  6. 272
  7. 791
  8. 993
  9. 775
  10. 640
  11. 523
  12. 997
  13. 466
  14. 403
  15. 588
  16. 240
  17. 1
  18. 209
  19. 280
  20. 322
  21. 432
  22. 287
  23. 963
  24. 292
  25. 122
  26. 459
  27. 913
  28. 647
  29. 388
  30. 565
  31. 64
  32. 420
  33. 225
  34. 18
  35. 969
  36. 582
  37. 919
  38. 804
  39. 984
  40. 257

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