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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 975 · 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. 1.586 + 267 =
  2. 2.A school has 346 children. 310 of them are girls. How many boys are there?
  3. 3.A school has 731 children. 546 of them are girls. How many boys are there?
  4. 4.A train has 468 people in the front coaches and 408 people in the back coaches. How many people are on the train?
  5. 5.268 + ? = 550
  6. 6.? + 230 = 658
  7. 7.A train has 275 people in the front coaches and 513 people in the back coaches. How many people are on the train?
  8. 8.419 − 354 =
  9. 9.? + 247 = 955
  10. 10.A school has 393 children. 390 of them are girls. How many boys are there?
  11. 11.605 − 533 =
  12. 12.862 + 101 =
  13. 13.776 + 205 =
  14. 14.A school has 531 children. 340 of them are girls. How many boys are there?
  15. 15.970 − 934 =
  16. 16.907 − ? = 716
  17. 17.215 + 141 =
  18. 18.? + 742 = 857
  19. 19.? − 167 = 141
  20. 20.A school has 343 children. 165 of them are girls. How many boys are there?
  21. 21.324 − ? = 29
  22. 22.A school has 425 children. 266 of them are girls. How many boys are there?
  23. 23.263 + 593 =
  24. 24.? + 550 = 971
  25. 25.533 − 178 =
  26. 26.A train has 599 people in the front coaches and 330 people in the back coaches. How many people are on the train?
  27. 27.789 − ? = 478
  28. 28.867 + ? = 983
  29. 29.? + 455 = 907
  30. 30.? + 661 = 836
  31. 31.A school has 575 children. 206 of them are girls. How many boys are there?
  32. 32.283 − ? = 144
  33. 33.A train has 442 people in the front coaches and 440 people in the back coaches. How many people are on the train?
  34. 34.A school has 524 children. 243 of them are girls. How many boys are there?
  35. 35.? + 261 = 475
  36. 36.A train has 212 people in the front coaches and 528 people in the back coaches. How many people are on the train?
  37. 37.819 − 231 =
  38. 38.A school has 531 children. 268 of them are girls. How many boys are there?
  39. 39.832 − 197 =
  40. 40.A train has 294 people in the front coaches and 164 people in the back coaches. How many people are on the train?

Answer key

  1. 853
  2. 36
  3. 185
  4. 876
  5. 282
  6. 428
  7. 788
  8. 65
  9. 708
  10. 3
  11. 72
  12. 963
  13. 981
  14. 191
  15. 36
  16. 191
  17. 356
  18. 115
  19. 308
  20. 178
  21. 295
  22. 159
  23. 856
  24. 421
  25. 355
  26. 929
  27. 311
  28. 116
  29. 452
  30. 175
  31. 369
  32. 139
  33. 882
  34. 281
  35. 214
  36. 740
  37. 588
  38. 263
  39. 635
  40. 458

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