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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 759 · 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 324 children. 240 of them are girls. How many boys are there?
  2. 2.A school has 914 children. 289 of them are girls. How many boys are there?
  3. 3.512 + 423 =
  4. 4.209 − 138 =
  5. 5.A school has 631 children. 467 of them are girls. How many boys are there?
  6. 6.A school has 274 children. 187 of them are girls. How many boys are there?
  7. 7.A train has 897 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  8. 8.802 − ? = 622
  9. 9.614 − ? = 313
  10. 10.A train has 658 people in the front coaches and 206 people in the back coaches. How many people are on the train?
  11. 11.783 − 157 =
  12. 12.A school has 647 children. 317 of them are girls. How many boys are there?
  13. 13.A train has 759 people in the front coaches and 231 people in the back coaches. How many people are on the train?
  14. 14.888 + 102 =
  15. 15.A school has 836 children. 705 of them are girls. How many boys are there?
  16. 16.314 − ? = 17
  17. 17.910 − 478 =
  18. 18.329 + ? = 802
  19. 19.A train has 328 people in the front coaches and 643 people in the back coaches. How many people are on the train?
  20. 20.? + 633 = 972
  21. 21.A train has 810 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  22. 22.547 − ? = 6
  23. 23.655 + 144 =
  24. 24.A train has 516 people in the front coaches and 349 people in the back coaches. How many people are on the train?
  25. 25.A train has 194 people in the front coaches and 799 people in the back coaches. How many people are on the train?
  26. 26.843 + ? = 998
  27. 27.A train has 868 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  28. 28.772 − 440 =
  29. 29.473 − 211 =
  30. 30.A train has 187 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  31. 31.869 + ? = 986
  32. 32.206 − ? = 55
  33. 33.A school has 584 children. 185 of them are girls. How many boys are there?
  34. 34.467 − ? = 186
  35. 35.530 − 436 =
  36. 36.311 − ? = 54
  37. 37.A train has 230 people in the front coaches and 491 people in the back coaches. How many people are on the train?
  38. 38.A train has 155 people in the front coaches and 642 people in the back coaches. How many people are on the train?
  39. 39.A train has 787 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  40. 40.A school has 815 children. 412 of them are girls. How many boys are there?

Answer key

  1. 84
  2. 625
  3. 935
  4. 71
  5. 164
  6. 87
  7. 998
  8. 180
  9. 301
  10. 864
  11. 626
  12. 330
  13. 990
  14. 990
  15. 131
  16. 297
  17. 432
  18. 473
  19. 971
  20. 339
  21. 954
  22. 541
  23. 799
  24. 865
  25. 993
  26. 155
  27. 981
  28. 332
  29. 262
  30. 297
  31. 117
  32. 151
  33. 399
  34. 281
  35. 94
  36. 257
  37. 721
  38. 797
  39. 946
  40. 403

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