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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 381 · 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. 1.447 + 239 =
  2. 2.A train has 643 people in the front coaches and 222 people in the back coaches. How many people are on the train?
  3. 3.438 − 377 =
  4. 4.? − 101 = 380
  5. 5.A train has 144 people in the front coaches and 268 people in the back coaches. How many people are on the train?
  6. 6.962 − 745 =
  7. 7.A train has 598 people in the front coaches and 325 people in the back coaches. How many people are on the train?
  8. 8.A train has 496 people in the front coaches and 315 people in the back coaches. How many people are on the train?
  9. 9.679 + 106 =
  10. 10.A school has 857 children. 250 of them are girls. How many boys are there?
  11. 11.652 + 105 =
  12. 12.? − 362 = 629
  13. 13.A train has 209 people in the front coaches and 198 people in the back coaches. How many people are on the train?
  14. 14.A school has 912 children. 768 of them are girls. How many boys are there?
  15. 15.? − 218 = 444
  16. 16.722 + 181 =
  17. 17.341 − 340 =
  18. 18.? + 186 = 450
  19. 19.581 + 304 =
  20. 20.803 − ? = 113
  21. 21.284 + 589 =
  22. 22.A school has 980 children. 757 of them are girls. How many boys are there?
  23. 23.486 − 268 =
  24. 24.? + 230 = 815
  25. 25.A train has 179 people in the front coaches and 236 people in the back coaches. How many people are on the train?
  26. 26.A train has 663 people in the front coaches and 211 people in the back coaches. How many people are on the train?
  27. 27.? − 298 = 696
  28. 28.664 − 524 =
  29. 29.513 − 152 =
  30. 30.175 + 459 =
  31. 31.A school has 878 children. 241 of them are girls. How many boys are there?
  32. 32.829 − 626 =
  33. 33.193 + 269 =
  34. 34.? − 149 = 432
  35. 35.343 + 637 =
  36. 36.A school has 926 children. 607 of them are girls. How many boys are there?
  37. 37.389 − ? = 232
  38. 38.914 − ? = 482
  39. 39.266 + ? = 376
  40. 40.228 − 119 =

Answer key

  1. 686
  2. 865
  3. 61
  4. 481
  5. 412
  6. 217
  7. 923
  8. 811
  9. 785
  10. 607
  11. 757
  12. 991
  13. 407
  14. 144
  15. 662
  16. 903
  17. 1
  18. 264
  19. 885
  20. 690
  21. 873
  22. 223
  23. 218
  24. 585
  25. 415
  26. 874
  27. 994
  28. 140
  29. 361
  30. 634
  31. 637
  32. 203
  33. 462
  34. 581
  35. 980
  36. 319
  37. 157
  38. 432
  39. 110
  40. 109

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