← 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 373 · 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. 1.274 + 273 =
  2. 2.358 + 454 =
  3. 3.174 + 806 =
  4. 4.A train has 496 people in the front coaches and 221 people in the back coaches. How many people are on the train?
  5. 5.A school has 555 children. 303 of them are girls. How many boys are there?
  6. 6.617 + 168 =
  7. 7.405 − 317 =
  8. 8.368 − 300 =
  9. 9.? − 665 = 31
  10. 10.126 + ? = 886
  11. 11.740 − 199 =
  12. 12.A train has 514 people in the front coaches and 194 people in the back coaches. How many people are on the train?
  13. 13.? + 622 = 974
  14. 14.A train has 682 people in the front coaches and 273 people in the back coaches. How many people are on the train?
  15. 15.A school has 803 children. 444 of them are girls. How many boys are there?
  16. 16.603 − 401 =
  17. 17.? + 754 = 973
  18. 18.868 + ? = 982
  19. 19.? + 746 = 876
  20. 20.A train has 485 people in the front coaches and 499 people in the back coaches. How many people are on the train?
  21. 21.755 − 337 =
  22. 22.A school has 954 children. 779 of them are girls. How many boys are there?
  23. 23.803 + 120 =
  24. 24.691 − 586 =
  25. 25.271 + 657 =
  26. 26.? − 469 = 310
  27. 27.? + 841 = 949
  28. 28.676 − ? = 334
  29. 29.617 − ? = 220
  30. 30.800 + ? = 913
  31. 31.502 + 191 =
  32. 32.? − 128 = 278
  33. 33.597 − 212 =
  34. 34.631 + ? = 901
  35. 35.536 + ? = 680
  36. 36.658 − 194 =
  37. 37.A train has 457 people in the front coaches and 219 people in the back coaches. How many people are on the train?
  38. 38.667 − 577 =
  39. 39.A school has 745 children. 371 of them are girls. How many boys are there?
  40. 40.594 + 210 =

Answer key

  1. 547
  2. 812
  3. 980
  4. 717
  5. 252
  6. 785
  7. 88
  8. 68
  9. 696
  10. 760
  11. 541
  12. 708
  13. 352
  14. 955
  15. 359
  16. 202
  17. 219
  18. 114
  19. 130
  20. 984
  21. 418
  22. 175
  23. 923
  24. 105
  25. 928
  26. 779
  27. 108
  28. 342
  29. 397
  30. 113
  31. 693
  32. 406
  33. 385
  34. 270
  35. 144
  36. 464
  37. 676
  38. 90
  39. 374
  40. 804

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