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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 833 · 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. 1.865 − ? = 686
  2. 2.? − 258 = 526
  3. 3.671 + 128 =
  4. 4.A school has 239 children. 161 of them are girls. How many boys are there?
  5. 5.A school has 711 children. 414 of them are girls. How many boys are there?
  6. 6.A school has 398 children. 146 of them are girls. How many boys are there?
  7. 7.527 − ? = 328
  8. 8.664 − 524 =
  9. 9.821 + ? = 982
  10. 10.328 − 133 =
  11. 11.A school has 305 children. 232 of them are girls. How many boys are there?
  12. 12.231 + 191 =
  13. 13.? + 896 = 999
  14. 14.453 + 100 =
  15. 15.894 − ? = 718
  16. 16.A train has 640 people in the front coaches and 194 people in the back coaches. How many people are on the train?
  17. 17.A train has 302 people in the front coaches and 697 people in the back coaches. How many people are on the train?
  18. 18.772 − 505 =
  19. 19.325 − 263 =
  20. 20.599 + 130 =
  21. 21.555 + ? = 852
  22. 22.230 − ? = 76
  23. 23.779 + 163 =
  24. 24.? − 645 = 142
  25. 25.A train has 836 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  26. 26.766 − ? = 366
  27. 27.596 − 173 =
  28. 28.849 + 122 =
  29. 29.A school has 827 children. 759 of them are girls. How many boys are there?
  30. 30.A train has 495 people in the front coaches and 400 people in the back coaches. How many people are on the train?
  31. 31.883 + 104 =
  32. 32.709 − 402 =
  33. 33.346 − 233 =
  34. 34.858 + ? = 978
  35. 35.A train has 732 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  36. 36.A school has 735 children. 603 of them are girls. How many boys are there?
  37. 37.801 − 437 =
  38. 38.? + 413 = 745
  39. 39.697 − 464 =
  40. 40.A train has 203 people in the front coaches and 260 people in the back coaches. How many people are on the train?

Answer key

  1. 179
  2. 784
  3. 799
  4. 78
  5. 297
  6. 252
  7. 199
  8. 140
  9. 161
  10. 195
  11. 73
  12. 422
  13. 103
  14. 553
  15. 176
  16. 834
  17. 999
  18. 267
  19. 62
  20. 729
  21. 297
  22. 154
  23. 942
  24. 787
  25. 937
  26. 400
  27. 423
  28. 971
  29. 68
  30. 895
  31. 987
  32. 307
  33. 113
  34. 120
  35. 914
  36. 132
  37. 364
  38. 332
  39. 233
  40. 463

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