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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 472 · 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. 1.614 − 173 =
  2. 2.A train has 715 people in the front coaches and 256 people in the back coaches. How many people are on the train?
  3. 3.716 − ? = 381
  4. 4.443 + ? = 600
  5. 5.567 + ? = 818
  6. 6.? − 487 = 91
  7. 7.? − 304 = 211
  8. 8.348 − 323 =
  9. 9.652 + 280 =
  10. 10.A train has 740 people in the front coaches and 145 people in the back coaches. How many people are on the train?
  11. 11.816 + 116 =
  12. 12.A train has 548 people in the front coaches and 417 people in the back coaches. How many people are on the train?
  13. 13.573 − 106 =
  14. 14.? − 120 = 413
  15. 15.235 + ? = 487
  16. 16.548 + 381 =
  17. 17.A school has 690 children. 533 of them are girls. How many boys are there?
  18. 18.340 + 157 =
  19. 19.236 − 194 =
  20. 20.566 − 413 =
  21. 21.A train has 599 people in the front coaches and 183 people in the back coaches. How many people are on the train?
  22. 22.A school has 448 children. 147 of them are girls. How many boys are there?
  23. 23.743 + ? = 843
  24. 24.784 − 401 =
  25. 25.? − 247 = 50
  26. 26.127 + 584 =
  27. 27.618 − 374 =
  28. 28.445 + 179 =
  29. 29.A train has 286 people in the front coaches and 684 people in the back coaches. How many people are on the train?
  30. 30.176 + 691 =
  31. 31.A school has 806 children. 461 of them are girls. How many boys are there?
  32. 32.A train has 877 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  33. 33.696 + ? = 822
  34. 34.436 − ? = 306
  35. 35.222 + 214 =
  36. 36.720 + 131 =
  37. 37.775 − 411 =
  38. 38.434 − ? = 315
  39. 39.A school has 230 children. 129 of them are girls. How many boys are there?
  40. 40.351 − ? = 239

Answer key

  1. 441
  2. 971
  3. 335
  4. 157
  5. 251
  6. 578
  7. 515
  8. 25
  9. 932
  10. 885
  11. 932
  12. 965
  13. 467
  14. 533
  15. 252
  16. 929
  17. 157
  18. 497
  19. 42
  20. 153
  21. 782
  22. 301
  23. 100
  24. 383
  25. 297
  26. 711
  27. 244
  28. 624
  29. 970
  30. 867
  31. 345
  32. 978
  33. 126
  34. 130
  35. 436
  36. 851
  37. 364
  38. 119
  39. 101
  40. 112

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