← 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 251 · 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 687 children. 466 of them are girls. How many boys are there?
  2. 2.A train has 442 people in the front coaches and 485 people in the back coaches. How many people are on the train?
  3. 3.A school has 425 children. 169 of them are girls. How many boys are there?
  4. 4.390 − 267 =
  5. 5.? + 147 = 344
  6. 6.472 + ? = 660
  7. 7.A school has 843 children. 604 of them are girls. How many boys are there?
  8. 8.A school has 488 children. 387 of them are girls. How many boys are there?
  9. 9.A train has 812 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  10. 10.A train has 870 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  11. 11.? − 613 = 358
  12. 12.516 + 139 =
  13. 13.A school has 235 children. 108 of them are girls. How many boys are there?
  14. 14.452 − 218 =
  15. 15.A school has 242 children. 182 of them are girls. How many boys are there?
  16. 16.252 + ? = 460
  17. 17.218 − 171 =
  18. 18.799 + 191 =
  19. 19.863 − 295 =
  20. 20.247 + 135 =
  21. 21.A train has 577 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  22. 22.343 + 170 =
  23. 23.A train has 732 people in the front coaches and 207 people in the back coaches. How many people are on the train?
  24. 24.191 + 256 =
  25. 25.360 − 207 =
  26. 26.? + 896 = 999
  27. 27.558 − 312 =
  28. 28.269 + 599 =
  29. 29.832 − 584 =
  30. 30.A school has 312 children. 144 of them are girls. How many boys are there?
  31. 31.239 − 218 =
  32. 32.453 − ? = 227
  33. 33.A school has 580 children. 129 of them are girls. How many boys are there?
  34. 34.863 − 112 =
  35. 35.A school has 817 children. 504 of them are girls. How many boys are there?
  36. 36.A school has 247 children. 149 of them are girls. How many boys are there?
  37. 37.546 − 487 =
  38. 38.A train has 170 people in the front coaches and 424 people in the back coaches. How many people are on the train?
  39. 39.? − 185 = 168
  40. 40.? + 122 = 829

Answer key

  1. 221
  2. 927
  3. 256
  4. 123
  5. 197
  6. 188
  7. 239
  8. 101
  9. 939
  10. 981
  11. 971
  12. 655
  13. 127
  14. 234
  15. 60
  16. 208
  17. 47
  18. 990
  19. 568
  20. 382
  21. 756
  22. 513
  23. 939
  24. 447
  25. 153
  26. 103
  27. 246
  28. 868
  29. 248
  30. 168
  31. 21
  32. 226
  33. 451
  34. 751
  35. 313
  36. 98
  37. 59
  38. 594
  39. 353
  40. 707

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