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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 431 · 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.A school has 859 children. 561 of them are girls. How many boys are there?
  2. 2.? − 427 = 405
  3. 3.A train has 723 people in the front coaches and 231 people in the back coaches. How many people are on the train?
  4. 4.813 − 399 =
  5. 5.? + 736 = 853
  6. 6.445 + 360 =
  7. 7.467 − 351 =
  8. 8.A train has 144 people in the front coaches and 436 people in the back coaches. How many people are on the train?
  9. 9.A train has 188 people in the front coaches and 282 people in the back coaches. How many people are on the train?
  10. 10.711 + ? = 938
  11. 11.369 − ? = 154
  12. 12.A train has 867 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  13. 13.198 + 662 =
  14. 14.A train has 403 people in the front coaches and 234 people in the back coaches. How many people are on the train?
  15. 15.412 − 137 =
  16. 16.651 − 193 =
  17. 17.603 + 126 =
  18. 18.A train has 115 people in the front coaches and 499 people in the back coaches. How many people are on the train?
  19. 19.A train has 788 people in the front coaches and 188 people in the back coaches. How many people are on the train?
  20. 20.879 − 607 =
  21. 21.237 + 476 =
  22. 22.530 − 338 =
  23. 23.659 + ? = 869
  24. 24.A train has 141 people in the front coaches and 296 people in the back coaches. How many people are on the train?
  25. 25.A school has 363 children. 283 of them are girls. How many boys are there?
  26. 26.A school has 210 children. 144 of them are girls. How many boys are there?
  27. 27.A train has 223 people in the front coaches and 226 people in the back coaches. How many people are on the train?
  28. 28.A train has 805 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  29. 29.231 − 121 =
  30. 30.409 − 327 =
  31. 31.104 + 337 =
  32. 32.A train has 364 people in the front coaches and 167 people in the back coaches. How many people are on the train?
  33. 33.335 − ? = 182
  34. 34.834 + 108 =
  35. 35.A school has 919 children. 134 of them are girls. How many boys are there?
  36. 36.A school has 204 children. 150 of them are girls. How many boys are there?
  37. 37.644 + 203 =
  38. 38.886 − 595 =
  39. 39.A school has 490 children. 207 of them are girls. How many boys are there?
  40. 40.A train has 125 people in the front coaches and 732 people in the back coaches. How many people are on the train?

Answer key

  1. 298
  2. 832
  3. 954
  4. 414
  5. 117
  6. 805
  7. 116
  8. 580
  9. 470
  10. 227
  11. 215
  12. 967
  13. 860
  14. 637
  15. 275
  16. 458
  17. 729
  18. 614
  19. 976
  20. 272
  21. 713
  22. 192
  23. 210
  24. 437
  25. 80
  26. 66
  27. 449
  28. 909
  29. 110
  30. 82
  31. 441
  32. 531
  33. 153
  34. 942
  35. 785
  36. 54
  37. 847
  38. 291
  39. 283
  40. 857

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