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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 713 · 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 school has 508 children. 100 of them are girls. How many boys are there?
  2. 2.A school has 961 children. 834 of them are girls. How many boys are there?
  3. 3.626 + 129 =
  4. 4.505 − ? = 59
  5. 5.478 + 189 =
  6. 6.A train has 163 people in the front coaches and 771 people in the back coaches. How many people are on the train?
  7. 7.553 + ? = 904
  8. 8.917 − 222 =
  9. 9.356 + 252 =
  10. 10.524 + 391 =
  11. 11.977 − 640 =
  12. 12.? + 281 = 556
  13. 13.555 − ? = 173
  14. 14.459 + 446 =
  15. 15.676 + 309 =
  16. 16.629 − ? = 93
  17. 17.960 − ? = 671
  18. 18.? + 710 = 846
  19. 19.371 + ? = 557
  20. 20.970 − 861 =
  21. 21.298 + 638 =
  22. 22.897 + 102 =
  23. 23.A train has 880 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  24. 24.A train has 344 people in the front coaches and 190 people in the back coaches. How many people are on the train?
  25. 25.A school has 248 children. 220 of them are girls. How many boys are there?
  26. 26.A train has 325 people in the front coaches and 429 people in the back coaches. How many people are on the train?
  27. 27.428 + 320 =
  28. 28.? − 199 = 277
  29. 29.810 − ? = 605
  30. 30.A school has 298 children. 122 of them are girls. How many boys are there?
  31. 31.830 + 153 =
  32. 32.A train has 612 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  33. 33.661 − ? = 26
  34. 34.317 − 271 =
  35. 35.303 − ? = 190
  36. 36.A train has 150 people in the front coaches and 376 people in the back coaches. How many people are on the train?
  37. 37.A train has 885 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  38. 38.662 − ? = 254
  39. 39.672 − ? = 466
  40. 40.239 − 193 =

Answer key

  1. 408
  2. 127
  3. 755
  4. 446
  5. 667
  6. 934
  7. 351
  8. 695
  9. 608
  10. 915
  11. 337
  12. 275
  13. 382
  14. 905
  15. 985
  16. 536
  17. 289
  18. 136
  19. 186
  20. 109
  21. 936
  22. 999
  23. 987
  24. 534
  25. 28
  26. 754
  27. 748
  28. 476
  29. 205
  30. 176
  31. 983
  32. 786
  33. 635
  34. 46
  35. 113
  36. 526
  37. 985
  38. 408
  39. 206
  40. 46

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