← 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 662 · 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. 1.304 + 425 =
  2. 2.368 + 523 =
  3. 3.309 − 166 =
  4. 4.A school has 645 children. 113 of them are girls. How many boys are there?
  5. 5.244 + 209 =
  6. 6.745 + 107 =
  7. 7.? − 216 = 698
  8. 8.833 − ? = 506
  9. 9.602 − ? = 63
  10. 10.A train has 567 people in the front coaches and 172 people in the back coaches. How many people are on the train?
  11. 11.133 + ? = 302
  12. 12.? + 646 = 797
  13. 13.A train has 867 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  14. 14.A school has 667 children. 162 of them are girls. How many boys are there?
  15. 15.A train has 843 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  16. 16.896 − ? = 567
  17. 17.A train has 305 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  18. 18.? + 489 = 931
  19. 19.129 + 117 =
  20. 20.214 + 454 =
  21. 21.689 + 146 =
  22. 22.354 − 289 =
  23. 23.? − 272 = 425
  24. 24.908 − ? = 208
  25. 25.? + 366 = 570
  26. 26.? − 204 = 172
  27. 27.A school has 787 children. 428 of them are girls. How many boys are there?
  28. 28.A train has 310 people in the front coaches and 409 people in the back coaches. How many people are on the train?
  29. 29.151 + ? = 689
  30. 30.441 − 336 =
  31. 31.778 − 583 =
  32. 32.573 − 559 =
  33. 33.? + 769 = 883
  34. 34.890 + 103 =
  35. 35.363 − ? = 75
  36. 36.544 − ? = 215
  37. 37.491 + ? = 706
  38. 38.382 − 203 =
  39. 39.772 − 283 =
  40. 40.A train has 720 people in the front coaches and 192 people in the back coaches. How many people are on the train?

Answer key

  1. 729
  2. 891
  3. 143
  4. 532
  5. 453
  6. 852
  7. 914
  8. 327
  9. 539
  10. 739
  11. 169
  12. 151
  13. 969
  14. 505
  15. 999
  16. 329
  17. 423
  18. 442
  19. 246
  20. 668
  21. 835
  22. 65
  23. 697
  24. 700
  25. 204
  26. 376
  27. 359
  28. 719
  29. 538
  30. 105
  31. 195
  32. 14
  33. 114
  34. 993
  35. 288
  36. 329
  37. 215
  38. 179
  39. 489
  40. 912

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