← 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 119 · 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 973 children. 342 of them are girls. How many boys are there?
  2. 2.834 + 151 =
  3. 3.777 − 245 =
  4. 4.A school has 912 children. 884 of them are girls. How many boys are there?
  5. 5.? − 232 = 46
  6. 6.? + 404 = 797
  7. 7.105 + 353 =
  8. 8.749 − ? = 613
  9. 9.? + 810 = 930
  10. 10.A train has 534 people in the front coaches and 432 people in the back coaches. How many people are on the train?
  11. 11.A school has 241 children. 218 of them are girls. How many boys are there?
  12. 12.A school has 594 children. 125 of them are girls. How many boys are there?
  13. 13.? + 824 = 967
  14. 14.938 − 184 =
  15. 15.? − 164 = 36
  16. 16.A train has 208 people in the front coaches and 645 people in the back coaches. How many people are on the train?
  17. 17.? − 492 = 24
  18. 18.179 + 555 =
  19. 19.? − 336 = 213
  20. 20.508 − 380 =
  21. 21.A school has 847 children. 648 of them are girls. How many boys are there?
  22. 22.? + 397 = 578
  23. 23.126 + 163 =
  24. 24.495 + ? = 831
  25. 25.893 − 716 =
  26. 26.385 + ? = 617
  27. 27.831 − ? = 363
  28. 28.A school has 940 children. 457 of them are girls. How many boys are there?
  29. 29.? + 306 = 527
  30. 30.A school has 268 children. 110 of them are girls. How many boys are there?
  31. 31.257 + 569 =
  32. 32.A train has 237 people in the front coaches and 432 people in the back coaches. How many people are on the train?
  33. 33.589 − ? = 460
  34. 34.A train has 418 people in the front coaches and 263 people in the back coaches. How many people are on the train?
  35. 35.991 − 482 =
  36. 36.198 + ? = 403
  37. 37.A school has 455 children. 390 of them are girls. How many boys are there?
  38. 38.A school has 414 children. 197 of them are girls. How many boys are there?
  39. 39.462 − 341 =
  40. 40.302 + ? = 429

Answer key

  1. 631
  2. 985
  3. 532
  4. 28
  5. 278
  6. 393
  7. 458
  8. 136
  9. 120
  10. 966
  11. 23
  12. 469
  13. 143
  14. 754
  15. 200
  16. 853
  17. 516
  18. 734
  19. 549
  20. 128
  21. 199
  22. 181
  23. 289
  24. 336
  25. 177
  26. 232
  27. 468
  28. 483
  29. 221
  30. 158
  31. 826
  32. 669
  33. 129
  34. 681
  35. 509
  36. 205
  37. 65
  38. 217
  39. 121
  40. 127

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