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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 655 · 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 train has 361 people in the front coaches and 459 people in the back coaches. How many people are on the train?
  2. 2.531 − 507 =
  3. 3.267 + ? = 706
  4. 4.? − 118 = 334
  5. 5.822 − ? = 16
  6. 6.A train has 175 people in the front coaches and 714 people in the back coaches. How many people are on the train?
  7. 7.547 − 303 =
  8. 8.? + 521 = 919
  9. 9.751 + ? = 941
  10. 10.666 + 183 =
  11. 11.341 − 114 =
  12. 12.A train has 707 people in the front coaches and 281 people in the back coaches. How many people are on the train?
  13. 13.A school has 766 children. 463 of them are girls. How many boys are there?
  14. 14.240 + 709 =
  15. 15.312 − ? = 60
  16. 16.? − 287 = 67
  17. 17.A train has 215 people in the front coaches and 261 people in the back coaches. How many people are on the train?
  18. 18.337 − 145 =
  19. 19.A train has 833 people in the front coaches and 137 people in the back coaches. How many people are on the train?
  20. 20.272 + 680 =
  21. 21.A school has 248 children. 127 of them are girls. How many boys are there?
  22. 22.788 + 194 =
  23. 23.134 + ? = 548
  24. 24.212 + 714 =
  25. 25.A school has 255 children. 250 of them are girls. How many boys are there?
  26. 26.245 + 606 =
  27. 27.A train has 844 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  28. 28.803 + 148 =
  29. 29.A school has 262 children. 203 of them are girls. How many boys are there?
  30. 30.A school has 817 children. 354 of them are girls. How many boys are there?
  31. 31.A train has 171 people in the front coaches and 772 people in the back coaches. How many people are on the train?
  32. 32.A school has 769 children. 648 of them are girls. How many boys are there?
  33. 33.764 − 366 =
  34. 34.353 + 500 =
  35. 35.? − 268 = 694
  36. 36.372 + 358 =
  37. 37.A train has 667 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  38. 38.503 − 256 =
  39. 39.? + 325 = 569
  40. 40.? − 293 = 376

Answer key

  1. 820
  2. 24
  3. 439
  4. 452
  5. 806
  6. 889
  7. 244
  8. 398
  9. 190
  10. 849
  11. 227
  12. 988
  13. 303
  14. 949
  15. 252
  16. 354
  17. 476
  18. 192
  19. 970
  20. 952
  21. 121
  22. 982
  23. 414
  24. 926
  25. 5
  26. 851
  27. 961
  28. 951
  29. 59
  30. 463
  31. 943
  32. 121
  33. 398
  34. 853
  35. 962
  36. 730
  37. 829
  38. 247
  39. 244
  40. 669

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