← 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 524 · 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.? − 258 = 438
  2. 2.412 − 270 =
  3. 3.848 + ? = 951
  4. 4.577 + 101 =
  5. 5.649 + 135 =
  6. 6.A school has 564 children. 174 of them are girls. How many boys are there?
  7. 7.A train has 778 people in the front coaches and 172 people in the back coaches. How many people are on the train?
  8. 8.A train has 469 people in the front coaches and 332 people in the back coaches. How many people are on the train?
  9. 9.476 + 103 =
  10. 10.A school has 998 children. 627 of them are girls. How many boys are there?
  11. 11.A school has 487 children. 437 of them are girls. How many boys are there?
  12. 12.253 − 101 =
  13. 13.A school has 468 children. 337 of them are girls. How many boys are there?
  14. 14.? − 792 = 25
  15. 15.A school has 317 children. 167 of them are girls. How many boys are there?
  16. 16.455 + 191 =
  17. 17.A school has 926 children. 812 of them are girls. How many boys are there?
  18. 18.550 − 173 =
  19. 19.264 + 338 =
  20. 20.A school has 343 children. 208 of them are girls. How many boys are there?
  21. 21.512 − ? = 395
  22. 22.? + 107 = 221
  23. 23.475 − 239 =
  24. 24.A train has 232 people in the front coaches and 195 people in the back coaches. How many people are on the train?
  25. 25.A school has 279 children. 174 of them are girls. How many boys are there?
  26. 26.567 + 135 =
  27. 27.303 − 229 =
  28. 28.304 + ? = 823
  29. 29.518 − ? = 92
  30. 30.490 − ? = 214
  31. 31.? + 382 = 566
  32. 32.692 − ? = 479
  33. 33.A train has 624 people in the front coaches and 372 people in the back coaches. How many people are on the train?
  34. 34.593 − ? = 448
  35. 35.433 − 307 =
  36. 36.781 + 217 =
  37. 37.323 + 121 =
  38. 38.790 − 547 =
  39. 39.A train has 889 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  40. 40.878 + 101 =

Answer key

  1. 696
  2. 142
  3. 103
  4. 678
  5. 784
  6. 390
  7. 950
  8. 801
  9. 579
  10. 371
  11. 50
  12. 152
  13. 131
  14. 817
  15. 150
  16. 646
  17. 114
  18. 377
  19. 602
  20. 135
  21. 117
  22. 114
  23. 236
  24. 427
  25. 105
  26. 702
  27. 74
  28. 519
  29. 426
  30. 276
  31. 184
  32. 213
  33. 996
  34. 145
  35. 126
  36. 998
  37. 444
  38. 243
  39. 999
  40. 979

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