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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 464 · 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 341 people in the front coaches and 197 people in the back coaches. How many people are on the train?
  2. 2.412 − ? = 219
  3. 3.291 − 155 =
  4. 4.564 + ? = 747
  5. 5.524 − ? = 177
  6. 6.352 − 207 =
  7. 7.A train has 249 people in the front coaches and 745 people in the back coaches. How many people are on the train?
  8. 8.? − 283 = 197
  9. 9.A school has 748 children. 284 of them are girls. How many boys are there?
  10. 10.A train has 845 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  11. 11.A school has 427 children. 148 of them are girls. How many boys are there?
  12. 12.? − 543 = 187
  13. 13.A school has 885 children. 694 of them are girls. How many boys are there?
  14. 14.535 − 454 =
  15. 15.735 − ? = 136
  16. 16.497 − ? = 46
  17. 17.560 − ? = 322
  18. 18.543 + 181 =
  19. 19.512 + ? = 637
  20. 20.? + 194 = 962
  21. 21.252 + 265 =
  22. 22.? − 575 = 421
  23. 23.A school has 969 children. 111 of them are girls. How many boys are there?
  24. 24.? − 405 = 234
  25. 25.958 − 304 =
  26. 26.? − 117 = 295
  27. 27.760 + 128 =
  28. 28.907 − 341 =
  29. 29.121 + ? = 638
  30. 30.515 + 445 =
  31. 31.? + 582 = 726
  32. 32.291 + 631 =
  33. 33.A train has 405 people in the front coaches and 186 people in the back coaches. How many people are on the train?
  34. 34.479 − 238 =
  35. 35.? + 346 = 466
  36. 36.223 − 163 =
  37. 37.A train has 333 people in the front coaches and 204 people in the back coaches. How many people are on the train?
  38. 38.813 + ? = 971
  39. 39.A train has 199 people in the front coaches and 554 people in the back coaches. How many people are on the train?
  40. 40.? − 348 = 294

Answer key

  1. 538
  2. 193
  3. 136
  4. 183
  5. 347
  6. 145
  7. 994
  8. 480
  9. 464
  10. 983
  11. 279
  12. 730
  13. 191
  14. 81
  15. 599
  16. 451
  17. 238
  18. 724
  19. 125
  20. 768
  21. 517
  22. 996
  23. 858
  24. 639
  25. 654
  26. 412
  27. 888
  28. 566
  29. 517
  30. 960
  31. 144
  32. 922
  33. 591
  34. 241
  35. 120
  36. 60
  37. 537
  38. 158
  39. 753
  40. 642

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