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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 448 · 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 train has 898 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  2. 2.160 + 719 =
  3. 3.303 − 259 =
  4. 4.325 − 302 =
  5. 5.621 + ? = 898
  6. 6.790 + 189 =
  7. 7.742 + 177 =
  8. 8.569 − 519 =
  9. 9.516 − 207 =
  10. 10.788 − ? = 642
  11. 11.826 + 110 =
  12. 12.934 − ? = 777
  13. 13.A train has 556 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  14. 14.979 − ? = 555
  15. 15.A school has 989 children. 586 of them are girls. How many boys are there?
  16. 16.296 + ? = 809
  17. 17.888 − 136 =
  18. 18.658 − 100 =
  19. 19.368 − 329 =
  20. 20.906 − 650 =
  21. 21.A train has 675 people in the front coaches and 193 people in the back coaches. How many people are on the train?
  22. 22.A school has 321 children. 265 of them are girls. How many boys are there?
  23. 23.896 + ? = 997
  24. 24.A school has 626 children. 480 of them are girls. How many boys are there?
  25. 25.938 − ? = 393
  26. 26.494 + ? = 821
  27. 27.976 − 886 =
  28. 28.757 + 142 =
  29. 29.A school has 612 children. 268 of them are girls. How many boys are there?
  30. 30.899 + 100 =
  31. 31.563 + 405 =
  32. 32.444 + 271 =
  33. 33.A school has 878 children. 132 of them are girls. How many boys are there?
  34. 34.A train has 627 people in the front coaches and 180 people in the back coaches. How many people are on the train?
  35. 35.A train has 150 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  36. 36.734 − 178 =
  37. 37.476 − 367 =
  38. 38.816 + 101 =
  39. 39.A school has 725 children. 165 of them are girls. How many boys are there?
  40. 40.? + 804 = 919

Answer key

  1. 998
  2. 879
  3. 44
  4. 23
  5. 277
  6. 979
  7. 919
  8. 50
  9. 309
  10. 146
  11. 936
  12. 157
  13. 679
  14. 424
  15. 403
  16. 513
  17. 752
  18. 558
  19. 39
  20. 256
  21. 868
  22. 56
  23. 101
  24. 146
  25. 545
  26. 327
  27. 90
  28. 899
  29. 344
  30. 999
  31. 968
  32. 715
  33. 746
  34. 807
  35. 390
  36. 556
  37. 109
  38. 917
  39. 560
  40. 115

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