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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 73 · 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. 1.562 − 149 =
  2. 2.441 − 395 =
  3. 3.A train has 769 people in the front coaches and 170 people in the back coaches. How many people are on the train?
  4. 4.910 − ? = 675
  5. 5.936 − 725 =
  6. 6.268 − 113 =
  7. 7.290 + 359 =
  8. 8.534 + ? = 883
  9. 9.264 − ? = 141
  10. 10.765 + 102 =
  11. 11.989 − ? = 467
  12. 12.735 + 211 =
  13. 13.A school has 350 children. 318 of them are girls. How many boys are there?
  14. 14.A train has 522 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  15. 15.A train has 677 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  16. 16.A train has 847 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  17. 17.898 − 201 =
  18. 18.? − 183 = 21
  19. 19.A school has 814 children. 457 of them are girls. How many boys are there?
  20. 20.236 + ? = 994
  21. 21.134 + 699 =
  22. 22.? − 100 = 181
  23. 23.A train has 225 people in the front coaches and 466 people in the back coaches. How many people are on the train?
  24. 24.137 + 267 =
  25. 25.393 − 143 =
  26. 26.A train has 481 people in the front coaches and 285 people in the back coaches. How many people are on the train?
  27. 27.655 − 270 =
  28. 28.? − 129 = 133
  29. 29.155 + 365 =
  30. 30.? − 147 = 314
  31. 31.A school has 333 children. 184 of them are girls. How many boys are there?
  32. 32.? − 437 = 262
  33. 33.? − 488 = 100
  34. 34.417 + ? = 823
  35. 35.318 − ? = 203
  36. 36.A train has 246 people in the front coaches and 522 people in the back coaches. How many people are on the train?
  37. 37.A train has 270 people in the front coaches and 594 people in the back coaches. How many people are on the train?
  38. 38.784 + 133 =
  39. 39.A train has 742 people in the front coaches and 246 people in the back coaches. How many people are on the train?
  40. 40.? + 173 = 666

Answer key

  1. 413
  2. 46
  3. 939
  4. 235
  5. 211
  6. 155
  7. 649
  8. 349
  9. 123
  10. 867
  11. 522
  12. 946
  13. 32
  14. 626
  15. 786
  16. 964
  17. 697
  18. 204
  19. 357
  20. 758
  21. 833
  22. 281
  23. 691
  24. 404
  25. 250
  26. 766
  27. 385
  28. 262
  29. 520
  30. 461
  31. 149
  32. 699
  33. 588
  34. 406
  35. 115
  36. 768
  37. 864
  38. 917
  39. 988
  40. 493

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