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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 218 · 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. 1.835 − ? = 511
  2. 2.A school has 323 children. 184 of them are girls. How many boys are there?
  3. 3.? + 439 = 768
  4. 4.846 − ? = 458
  5. 5.A train has 594 people in the front coaches and 154 people in the back coaches. How many people are on the train?
  6. 6.A school has 387 children. 198 of them are girls. How many boys are there?
  7. 7.508 + 119 =
  8. 8.328 − 107 =
  9. 9.538 − ? = 236
  10. 10.709 − ? = 187
  11. 11.411 − 110 =
  12. 12.A train has 229 people in the front coaches and 200 people in the back coaches. How many people are on the train?
  13. 13.? − 772 = 190
  14. 14.A school has 779 children. 766 of them are girls. How many boys are there?
  15. 15.A train has 342 people in the front coaches and 222 people in the back coaches. How many people are on the train?
  16. 16.612 + ? = 791
  17. 17.437 − 300 =
  18. 18.A school has 746 children. 296 of them are girls. How many boys are there?
  19. 19.? − 156 = 319
  20. 20.A train has 655 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  21. 21.? + 182 = 955
  22. 22.? − 771 = 27
  23. 23.291 − 278 =
  24. 24.795 + 112 =
  25. 25.250 + 149 =
  26. 26.337 − 182 =
  27. 27.479 + ? = 695
  28. 28.254 − 127 =
  29. 29.392 − 190 =
  30. 30.709 − 210 =
  31. 31.A train has 512 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  32. 32.548 + ? = 894
  33. 33.? + 511 = 994
  34. 34.? + 207 = 751
  35. 35.A school has 803 children. 301 of them are girls. How many boys are there?
  36. 36.522 + ? = 831
  37. 37.795 + ? = 920
  38. 38.A school has 746 children. 106 of them are girls. How many boys are there?
  39. 39.? − 226 = 296
  40. 40.? − 481 = 222

Answer key

  1. 324
  2. 139
  3. 329
  4. 388
  5. 748
  6. 189
  7. 627
  8. 221
  9. 302
  10. 522
  11. 301
  12. 429
  13. 962
  14. 13
  15. 564
  16. 179
  17. 137
  18. 450
  19. 475
  20. 807
  21. 773
  22. 798
  23. 13
  24. 907
  25. 399
  26. 155
  27. 216
  28. 127
  29. 202
  30. 499
  31. 674
  32. 346
  33. 483
  34. 544
  35. 502
  36. 309
  37. 125
  38. 640
  39. 522
  40. 703

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