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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 960 · 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. 1.628 − 111 =
  2. 2.A train has 469 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  3. 3.921 − 628 =
  4. 4.865 + ? = 970
  5. 5.801 − 755 =
  6. 6.269 − 149 =
  7. 7.829 − 634 =
  8. 8.929 − 204 =
  9. 9.? + 682 = 982
  10. 10.A train has 455 people in the front coaches and 445 people in the back coaches. How many people are on the train?
  11. 11.932 − ? = 231
  12. 12.885 + 111 =
  13. 13.739 + ? = 934
  14. 14.723 + 180 =
  15. 15.713 − ? = 212
  16. 16.134 + ? = 966
  17. 17.606 + ? = 989
  18. 18.A school has 611 children. 135 of them are girls. How many boys are there?
  19. 19.705 + 113 =
  20. 20.506 + 247 =
  21. 21.A school has 660 children. 568 of them are girls. How many boys are there?
  22. 22.469 + 424 =
  23. 23.A school has 882 children. 111 of them are girls. How many boys are there?
  24. 24.699 − 172 =
  25. 25.244 + 155 =
  26. 26.A train has 164 people in the front coaches and 485 people in the back coaches. How many people are on the train?
  27. 27.552 − ? = 284
  28. 28.603 − ? = 349
  29. 29.729 + 172 =
  30. 30.A school has 487 children. 314 of them are girls. How many boys are there?
  31. 31.A train has 409 people in the front coaches and 328 people in the back coaches. How many people are on the train?
  32. 32.785 + 148 =
  33. 33.? − 149 = 247
  34. 34.832 − ? = 579
  35. 35.380 + 586 =
  36. 36.A train has 579 people in the front coaches and 358 people in the back coaches. How many people are on the train?
  37. 37.A school has 521 children. 447 of them are girls. How many boys are there?
  38. 38.442 − 260 =
  39. 39.? − 251 = 356
  40. 40.A school has 746 children. 174 of them are girls. How many boys are there?

Answer key

  1. 517
  2. 709
  3. 293
  4. 105
  5. 46
  6. 120
  7. 195
  8. 725
  9. 300
  10. 900
  11. 701
  12. 996
  13. 195
  14. 903
  15. 501
  16. 832
  17. 383
  18. 476
  19. 818
  20. 753
  21. 92
  22. 893
  23. 771
  24. 527
  25. 399
  26. 649
  27. 268
  28. 254
  29. 901
  30. 173
  31. 737
  32. 933
  33. 396
  34. 253
  35. 966
  36. 937
  37. 74
  38. 182
  39. 607
  40. 572

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