← 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 405 · 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 210 children. 107 of them are girls. How many boys are there?
  2. 2.A train has 515 people in the front coaches and 334 people in the back coaches. How many people are on the train?
  3. 3.A train has 458 people in the front coaches and 160 people in the back coaches. How many people are on the train?
  4. 4.799 − 689 =
  5. 5.691 + 279 =
  6. 6.? + 457 = 846
  7. 7.A train has 510 people in the front coaches and 145 people in the back coaches. How many people are on the train?
  8. 8.? + 169 = 376
  9. 9.A train has 131 people in the front coaches and 412 people in the back coaches. How many people are on the train?
  10. 10.102 + 174 =
  11. 11.449 − 126 =
  12. 12.482 − 264 =
  13. 13.992 − ? = 92
  14. 14.A train has 745 people in the front coaches and 201 people in the back coaches. How many people are on the train?
  15. 15.? − 349 = 515
  16. 16.370 − ? = 194
  17. 17.935 − 465 =
  18. 18.632 + 295 =
  19. 19.550 − 250 =
  20. 20.329 + ? = 659
  21. 21.? − 472 = 52
  22. 22.A train has 193 people in the front coaches and 430 people in the back coaches. How many people are on the train?
  23. 23.422 + ? = 839
  24. 24.645 − 375 =
  25. 25.A school has 723 children. 235 of them are girls. How many boys are there?
  26. 26.405 − 175 =
  27. 27.721 + 252 =
  28. 28.? + 136 = 583
  29. 29.? − 636 = 73
  30. 30.A school has 871 children. 523 of them are girls. How many boys are there?
  31. 31.A school has 800 children. 571 of them are girls. How many boys are there?
  32. 32.A school has 318 children. 219 of them are girls. How many boys are there?
  33. 33.434 − 109 =
  34. 34.957 − 253 =
  35. 35.732 + 122 =
  36. 36.? − 273 = 242
  37. 37.A train has 797 people in the front coaches and 172 people in the back coaches. How many people are on the train?
  38. 38.225 − 133 =
  39. 39.436 + ? = 796
  40. 40.A school has 239 children. 230 of them are girls. How many boys are there?

Answer key

  1. 103
  2. 849
  3. 618
  4. 110
  5. 970
  6. 389
  7. 655
  8. 207
  9. 543
  10. 276
  11. 323
  12. 218
  13. 900
  14. 946
  15. 864
  16. 176
  17. 470
  18. 927
  19. 300
  20. 330
  21. 524
  22. 623
  23. 417
  24. 270
  25. 488
  26. 230
  27. 973
  28. 447
  29. 709
  30. 348
  31. 229
  32. 99
  33. 325
  34. 704
  35. 854
  36. 515
  37. 969
  38. 92
  39. 360
  40. 9

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