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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 444 · 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 221 people in the front coaches and 353 people in the back coaches. How many people are on the train?
  2. 2.335 + ? = 719
  3. 3.? − 101 = 459
  4. 4.807 − 549 =
  5. 5.822 − 384 =
  6. 6.120 + 637 =
  7. 7.660 − 524 =
  8. 8.462 + ? = 711
  9. 9.A school has 495 children. 263 of them are girls. How many boys are there?
  10. 10.A train has 188 people in the front coaches and 551 people in the back coaches. How many people are on the train?
  11. 11.A train has 111 people in the front coaches and 673 people in the back coaches. How many people are on the train?
  12. 12.746 + 126 =
  13. 13.? + 265 = 461
  14. 14.330 − 181 =
  15. 15.? − 211 = 299
  16. 16.? + 828 = 998
  17. 17.A train has 804 people in the front coaches and 124 people in the back coaches. How many people are on the train?
  18. 18.? + 182 = 781
  19. 19.A train has 260 people in the front coaches and 205 people in the back coaches. How many people are on the train?
  20. 20.705 + ? = 979
  21. 21.845 + 135 =
  22. 22.? + 117 = 561
  23. 23.832 − 365 =
  24. 24.? + 683 = 792
  25. 25.970 − 268 =
  26. 26.454 − 445 =
  27. 27.A school has 550 children. 471 of them are girls. How many boys are there?
  28. 28.536 + 104 =
  29. 29.? + 626 = 732
  30. 30.? + 849 = 977
  31. 31.381 − ? = 37
  32. 32.? − 271 = 42
  33. 33.A school has 400 children. 173 of them are girls. How many boys are there?
  34. 34.879 + 119 =
  35. 35.491 + 349 =
  36. 36.871 − 610 =
  37. 37.286 + 265 =
  38. 38.341 + 128 =
  39. 39.691 + 228 =
  40. 40.A train has 247 people in the front coaches and 136 people in the back coaches. How many people are on the train?

Answer key

  1. 574
  2. 384
  3. 560
  4. 258
  5. 438
  6. 757
  7. 136
  8. 249
  9. 232
  10. 739
  11. 784
  12. 872
  13. 196
  14. 149
  15. 510
  16. 170
  17. 928
  18. 599
  19. 465
  20. 274
  21. 980
  22. 444
  23. 467
  24. 109
  25. 702
  26. 9
  27. 79
  28. 640
  29. 106
  30. 128
  31. 344
  32. 313
  33. 227
  34. 998
  35. 840
  36. 261
  37. 551
  38. 469
  39. 919
  40. 383

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