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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 750 · 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 school has 945 children. 878 of them are girls. How many boys are there?
  2. 2.A school has 808 children. 403 of them are girls. How many boys are there?
  3. 3.733 + 140 =
  4. 4.590 − 455 =
  5. 5.417 − 392 =
  6. 6.894 − 588 =
  7. 7.561 + 191 =
  8. 8.? + 739 = 894
  9. 9.A train has 576 people in the front coaches and 249 people in the back coaches. How many people are on the train?
  10. 10.A school has 420 children. 232 of them are girls. How many boys are there?
  11. 11.976 − ? = 266
  12. 12.? + 136 = 544
  13. 13.767 − 274 =
  14. 14.A school has 321 children. 255 of them are girls. How many boys are there?
  15. 15.A train has 857 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  16. 16.822 + 101 =
  17. 17.455 − 420 =
  18. 18.A train has 649 people in the front coaches and 338 people in the back coaches. How many people are on the train?
  19. 19.403 + 101 =
  20. 20.A train has 545 people in the front coaches and 372 people in the back coaches. How many people are on the train?
  21. 21.A school has 490 children. 180 of them are girls. How many boys are there?
  22. 22.245 − 213 =
  23. 23.409 − 285 =
  24. 24.750 + 130 =
  25. 25.608 + 289 =
  26. 26.484 + 140 =
  27. 27.? + 785 = 991
  28. 28.452 + 383 =
  29. 29.A train has 196 people in the front coaches and 460 people in the back coaches. How many people are on the train?
  30. 30.A school has 221 children. 187 of them are girls. How many boys are there?
  31. 31.A school has 460 children. 336 of them are girls. How many boys are there?
  32. 32.696 − 192 =
  33. 33.A school has 435 children. 237 of them are girls. How many boys are there?
  34. 34.254 − 184 =
  35. 35.A train has 830 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  36. 36.A school has 527 children. 268 of them are girls. How many boys are there?
  37. 37.808 − 170 =
  38. 38.186 + 115 =
  39. 39.528 + 253 =
  40. 40.A school has 572 children. 149 of them are girls. How many boys are there?

Answer key

  1. 67
  2. 405
  3. 873
  4. 135
  5. 25
  6. 306
  7. 752
  8. 155
  9. 825
  10. 188
  11. 710
  12. 408
  13. 493
  14. 66
  15. 980
  16. 923
  17. 35
  18. 987
  19. 504
  20. 917
  21. 310
  22. 32
  23. 124
  24. 880
  25. 897
  26. 624
  27. 206
  28. 835
  29. 656
  30. 34
  31. 124
  32. 504
  33. 198
  34. 70
  35. 963
  36. 259
  37. 638
  38. 301
  39. 781
  40. 423

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