← 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 135 · 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. 1.804 + 101 =
  2. 2.? − 192 = 265
  3. 3.454 + 187 =
  4. 4.265 + ? = 474
  5. 5.806 + 113 =
  6. 6.282 + 157 =
  7. 7.342 − ? = 154
  8. 8.320 + 332 =
  9. 9.573 − ? = 274
  10. 10.411 + 572 =
  11. 11.A school has 582 children. 216 of them are girls. How many boys are there?
  12. 12.794 + 163 =
  13. 13.671 + ? = 973
  14. 14.A school has 773 children. 648 of them are girls. How many boys are there?
  15. 15.? − 477 = 79
  16. 16.710 − ? = 152
  17. 17.? − 119 = 493
  18. 18.A train has 689 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  19. 19.441 + 318 =
  20. 20.554 − 120 =
  21. 21.A school has 511 children. 219 of them are girls. How many boys are there?
  22. 22.610 − ? = 417
  23. 23.A train has 834 people in the front coaches and 124 people in the back coaches. How many people are on the train?
  24. 24.A school has 311 children. 160 of them are girls. How many boys are there?
  25. 25.152 + 489 =
  26. 26.342 − 151 =
  27. 27.? − 569 = 411
  28. 28.A train has 468 people in the front coaches and 439 people in the back coaches. How many people are on the train?
  29. 29.A school has 956 children. 723 of them are girls. How many boys are there?
  30. 30.410 + 481 =
  31. 31.397 − ? = 19
  32. 32.607 + 191 =
  33. 33.A train has 455 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  34. 34.? + 229 = 738
  35. 35.A train has 446 people in the front coaches and 322 people in the back coaches. How many people are on the train?
  36. 36.336 − ? = 185
  37. 37.961 − 687 =
  38. 38.A school has 339 children. 129 of them are girls. How many boys are there?
  39. 39.509 + ? = 930
  40. 40.943 − 348 =

Answer key

  1. 905
  2. 457
  3. 641
  4. 209
  5. 919
  6. 439
  7. 188
  8. 652
  9. 299
  10. 983
  11. 366
  12. 957
  13. 302
  14. 125
  15. 556
  16. 558
  17. 612
  18. 799
  19. 759
  20. 434
  21. 292
  22. 193
  23. 958
  24. 151
  25. 641
  26. 191
  27. 980
  28. 907
  29. 233
  30. 891
  31. 378
  32. 798
  33. 588
  34. 509
  35. 768
  36. 151
  37. 274
  38. 210
  39. 421
  40. 595

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