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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 753 · 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 884 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  2. 2.372 + 364 =
  3. 3.A train has 265 people in the front coaches and 479 people in the back coaches. How many people are on the train?
  4. 4.727 − 512 =
  5. 5.413 − 247 =
  6. 6.? + 872 = 985
  7. 7.488 + 256 =
  8. 8.198 + ? = 721
  9. 9.? − 180 = 61
  10. 10.344 + ? = 754
  11. 11.433 + 406 =
  12. 12.A school has 949 children. 193 of them are girls. How many boys are there?
  13. 13.447 − 110 =
  14. 14.230 + 179 =
  15. 15.448 − 107 =
  16. 16.742 − 242 =
  17. 17.376 + 473 =
  18. 18.693 + 138 =
  19. 19.? − 450 = 66
  20. 20.619 − ? = 253
  21. 21.329 − 110 =
  22. 22.? − 162 = 538
  23. 23.320 + 131 =
  24. 24.A train has 253 people in the front coaches and 454 people in the back coaches. How many people are on the train?
  25. 25.330 − ? = 207
  26. 26.649 + ? = 918
  27. 27.837 + 118 =
  28. 28.A train has 611 people in the front coaches and 330 people in the back coaches. How many people are on the train?
  29. 29.722 + ? = 926
  30. 30.A train has 258 people in the front coaches and 241 people in the back coaches. How many people are on the train?
  31. 31.? + 602 = 745
  32. 32.A train has 811 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  33. 33.A school has 403 children. 109 of them are girls. How many boys are there?
  34. 34.716 − 652 =
  35. 35.405 − ? = 82
  36. 36.A train has 881 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  37. 37.973 − 634 =
  38. 38.A school has 974 children. 135 of them are girls. How many boys are there?
  39. 39.210 + 271 =
  40. 40.A train has 235 people in the front coaches and 546 people in the back coaches. How many people are on the train?

Answer key

  1. 990
  2. 736
  3. 744
  4. 215
  5. 166
  6. 113
  7. 744
  8. 523
  9. 241
  10. 410
  11. 839
  12. 756
  13. 337
  14. 409
  15. 341
  16. 500
  17. 849
  18. 831
  19. 516
  20. 366
  21. 219
  22. 700
  23. 451
  24. 707
  25. 123
  26. 269
  27. 955
  28. 941
  29. 204
  30. 499
  31. 143
  32. 963
  33. 294
  34. 64
  35. 323
  36. 997
  37. 339
  38. 839
  39. 481
  40. 781

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