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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 706 · 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. 1.876 − ? = 388
  2. 2.288 − ? = 22
  3. 3.562 + 312 =
  4. 4.580 + 150 =
  5. 5.102 + 244 =
  6. 6.? − 134 = 114
  7. 7.457 − 305 =
  8. 8.241 − 108 =
  9. 9.? − 258 = 158
  10. 10.? + 161 = 787
  11. 11.797 + 121 =
  12. 12.A train has 820 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  13. 13.163 + 364 =
  14. 14.? + 865 = 976
  15. 15.A train has 881 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  16. 16.214 − 103 =
  17. 17.529 + 349 =
  18. 18.A train has 241 people in the front coaches and 464 people in the back coaches. How many people are on the train?
  19. 19.? + 825 = 952
  20. 20.A school has 753 children. 451 of them are girls. How many boys are there?
  21. 21.608 − 448 =
  22. 22.A school has 835 children. 237 of them are girls. How many boys are there?
  23. 23.230 + ? = 406
  24. 24.479 − 172 =
  25. 25.200 + 299 =
  26. 26.201 + 690 =
  27. 27.? + 610 = 929
  28. 28.161 + 545 =
  29. 29.A train has 768 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  30. 30.A school has 602 children. 402 of them are girls. How many boys are there?
  31. 31.? + 681 = 860
  32. 32.A train has 723 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  33. 33.619 − 455 =
  34. 34.A train has 346 people in the front coaches and 553 people in the back coaches. How many people are on the train?
  35. 35.343 + ? = 444
  36. 36.? + 371 = 749
  37. 37.A school has 534 children. 115 of them are girls. How many boys are there?
  38. 38.A school has 804 children. 286 of them are girls. How many boys are there?
  39. 39.429 + 527 =
  40. 40.A train has 548 people in the front coaches and 444 people in the back coaches. How many people are on the train?

Answer key

  1. 488
  2. 266
  3. 874
  4. 730
  5. 346
  6. 248
  7. 152
  8. 133
  9. 416
  10. 626
  11. 918
  12. 933
  13. 527
  14. 111
  15. 986
  16. 111
  17. 878
  18. 705
  19. 127
  20. 302
  21. 160
  22. 598
  23. 176
  24. 307
  25. 499
  26. 891
  27. 319
  28. 706
  29. 876
  30. 200
  31. 179
  32. 878
  33. 164
  34. 899
  35. 101
  36. 378
  37. 419
  38. 518
  39. 956
  40. 992

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