← 3-digit addition and subtraction lesson New set →

Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 940 · 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 478 children. 405 of them are girls. How many boys are there?
  2. 2.811 − 317 =
  3. 3.A school has 831 children. 499 of them are girls. How many boys are there?
  4. 4.242 + 225 =
  5. 5.171 + 722 =
  6. 6.233 + 137 =
  7. 7.616 + 326 =
  8. 8.? − 135 = 363
  9. 9.219 + 217 =
  10. 10.388 + 181 =
  11. 11.? + 136 = 457
  12. 12.? + 817 = 936
  13. 13.A train has 571 people in the front coaches and 178 people in the back coaches. How many people are on the train?
  14. 14.760 − 204 =
  15. 15.811 + 107 =
  16. 16.? − 198 = 139
  17. 17.? − 298 = 118
  18. 18.140 + 174 =
  19. 19.596 + ? = 697
  20. 20.? − 489 = 16
  21. 21.? + 233 = 948
  22. 22.? − 188 = 95
  23. 23.664 − ? = 158
  24. 24.748 + 250 =
  25. 25.299 − 177 =
  26. 26.A school has 831 children. 779 of them are girls. How many boys are there?
  27. 27.711 − 303 =
  28. 28.A school has 479 children. 206 of them are girls. How many boys are there?
  29. 29.714 + 266 =
  30. 30.A train has 317 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  31. 31.370 − ? = 117
  32. 32.? + 886 = 991
  33. 33.A train has 665 people in the front coaches and 166 people in the back coaches. How many people are on the train?
  34. 34.? − 243 = 192
  35. 35.742 − 689 =
  36. 36.268 − 178 =
  37. 37.615 + 277 =
  38. 38.488 + ? = 706
  39. 39.A train has 345 people in the front coaches and 435 people in the back coaches. How many people are on the train?
  40. 40.250 − 114 =

Answer key

  1. 73
  2. 494
  3. 332
  4. 467
  5. 893
  6. 370
  7. 942
  8. 498
  9. 436
  10. 569
  11. 321
  12. 119
  13. 749
  14. 556
  15. 918
  16. 337
  17. 416
  18. 314
  19. 101
  20. 505
  21. 715
  22. 283
  23. 506
  24. 998
  25. 122
  26. 52
  27. 408
  28. 273
  29. 980
  30. 530
  31. 253
  32. 105
  33. 831
  34. 435
  35. 53
  36. 90
  37. 892
  38. 218
  39. 780
  40. 136

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets