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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 542 · 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. 1.443 + 456 =
  2. 2.? + 112 = 731
  3. 3.789 − 531 =
  4. 4.306 − ? = 115
  5. 5.A train has 654 people in the front coaches and 130 people in the back coaches. How many people are on the train?
  6. 6.697 − 344 =
  7. 7.827 − ? = 50
  8. 8.601 − 105 =
  9. 9.152 + 233 =
  10. 10.? + 373 = 942
  11. 11.370 − 335 =
  12. 12.A train has 672 people in the front coaches and 219 people in the back coaches. How many people are on the train?
  13. 13.891 − ? = 49
  14. 14.349 − ? = 218
  15. 15.A school has 323 children. 285 of them are girls. How many boys are there?
  16. 16.686 − 386 =
  17. 17.541 − 222 =
  18. 18.190 + 218 =
  19. 19.318 − ? = 19
  20. 20.A train has 556 people in the front coaches and 423 people in the back coaches. How many people are on the train?
  21. 21.408 − ? = 63
  22. 22.633 − 580 =
  23. 23.? − 394 = 328
  24. 24.339 + 481 =
  25. 25.313 + 111 =
  26. 26.A school has 934 children. 551 of them are girls. How many boys are there?
  27. 27.984 − 884 =
  28. 28.557 − 516 =
  29. 29.A train has 568 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  30. 30.A school has 742 children. 238 of them are girls. How many boys are there?
  31. 31.A train has 800 people in the front coaches and 195 people in the back coaches. How many people are on the train?
  32. 32.A train has 105 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  33. 33.863 + 116 =
  34. 34.396 + ? = 512
  35. 35.200 + 403 =
  36. 36.A school has 222 children. 142 of them are girls. How many boys are there?
  37. 37.A school has 880 children. 846 of them are girls. How many boys are there?
  38. 38.A train has 631 people in the front coaches and 305 people in the back coaches. How many people are on the train?
  39. 39.478 + 251 =
  40. 40.451 − 260 =

Answer key

  1. 899
  2. 619
  3. 258
  4. 191
  5. 784
  6. 353
  7. 777
  8. 496
  9. 385
  10. 569
  11. 35
  12. 891
  13. 842
  14. 131
  15. 38
  16. 300
  17. 319
  18. 408
  19. 299
  20. 979
  21. 345
  22. 53
  23. 722
  24. 820
  25. 424
  26. 383
  27. 100
  28. 41
  29. 730
  30. 504
  31. 995
  32. 260
  33. 979
  34. 116
  35. 603
  36. 80
  37. 34
  38. 936
  39. 729
  40. 191

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