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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 703 · 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. 1.730 + 128 =
  2. 2.771 − 468 =
  3. 3.118 + 500 =
  4. 4.745 + 149 =
  5. 5.? + 670 = 854
  6. 6.363 + 484 =
  7. 7.A train has 619 people in the front coaches and 250 people in the back coaches. How many people are on the train?
  8. 8.527 − 303 =
  9. 9.616 − 538 =
  10. 10.511 − 437 =
  11. 11.785 − ? = 403
  12. 12.460 + ? = 768
  13. 13.A train has 232 people in the front coaches and 654 people in the back coaches. How many people are on the train?
  14. 14.340 + 521 =
  15. 15.616 − 608 =
  16. 16.A train has 433 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  17. 17.774 + ? = 896
  18. 18.A train has 378 people in the front coaches and 132 people in the back coaches. How many people are on the train?
  19. 19.833 − 493 =
  20. 20.A train has 175 people in the front coaches and 239 people in the back coaches. How many people are on the train?
  21. 21.A school has 811 children. 136 of them are girls. How many boys are there?
  22. 22.? + 724 = 835
  23. 23.644 + 233 =
  24. 24.192 + 344 =
  25. 25.? − 118 = 240
  26. 26.635 − 617 =
  27. 27.302 − ? = 130
  28. 28.A train has 651 people in the front coaches and 132 people in the back coaches. How many people are on the train?
  29. 29.657 + 145 =
  30. 30.A train has 659 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  31. 31.? − 793 = 49
  32. 32.229 + 542 =
  33. 33.887 − ? = 15
  34. 34.A school has 336 children. 290 of them are girls. How many boys are there?
  35. 35.? − 456 = 237
  36. 36.? + 472 = 977
  37. 37.? − 157 = 156
  38. 38.353 + ? = 546
  39. 39.A train has 254 people in the front coaches and 229 people in the back coaches. How many people are on the train?
  40. 40.311 + ? = 553

Answer key

  1. 858
  2. 303
  3. 618
  4. 894
  5. 184
  6. 847
  7. 869
  8. 224
  9. 78
  10. 74
  11. 382
  12. 308
  13. 886
  14. 861
  15. 8
  16. 542
  17. 122
  18. 510
  19. 340
  20. 414
  21. 675
  22. 111
  23. 877
  24. 536
  25. 358
  26. 18
  27. 172
  28. 783
  29. 802
  30. 841
  31. 842
  32. 771
  33. 872
  34. 46
  35. 693
  36. 505
  37. 313
  38. 193
  39. 483
  40. 242

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