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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 579 · 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.? − 218 = 185
  2. 2.604 + 152 =
  3. 3.? − 859 = 5
  4. 4.A school has 994 children. 242 of them are girls. How many boys are there?
  5. 5.A train has 345 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  6. 6.? − 367 = 48
  7. 7.746 − 278 =
  8. 8.A train has 404 people in the front coaches and 210 people in the back coaches. How many people are on the train?
  9. 9.514 − 302 =
  10. 10.307 + 425 =
  11. 11.623 − ? = 333
  12. 12.304 + ? = 405
  13. 13.A train has 371 people in the front coaches and 336 people in the back coaches. How many people are on the train?
  14. 14.? + 108 = 760
  15. 15.A school has 505 children. 364 of them are girls. How many boys are there?
  16. 16.A train has 527 people in the front coaches and 196 people in the back coaches. How many people are on the train?
  17. 17.? − 217 = 613
  18. 18.A school has 805 children. 588 of them are girls. How many boys are there?
  19. 19.474 + 467 =
  20. 20.? + 182 = 918
  21. 21.A school has 522 children. 148 of them are girls. How many boys are there?
  22. 22.? + 768 = 974
  23. 23.? + 895 = 996
  24. 24.A school has 673 children. 254 of them are girls. How many boys are there?
  25. 25.A train has 804 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  26. 26.129 + 264 =
  27. 27.318 + 601 =
  28. 28.914 − ? = 153
  29. 29.887 − 481 =
  30. 30.A train has 318 people in the front coaches and 649 people in the back coaches. How many people are on the train?
  31. 31.602 − ? = 205
  32. 32.A train has 853 people in the front coaches and 121 people in the back coaches. How many people are on the train?
  33. 33.118 + 426 =
  34. 34.476 − ? = 219
  35. 35.985 − ? = 801
  36. 36.A train has 713 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  37. 37.A train has 612 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  38. 38.? − 101 = 201
  39. 39.853 + 131 =
  40. 40.478 + 514 =

Answer key

  1. 403
  2. 756
  3. 864
  4. 752
  5. 532
  6. 415
  7. 468
  8. 614
  9. 212
  10. 732
  11. 290
  12. 101
  13. 707
  14. 652
  15. 141
  16. 723
  17. 830
  18. 217
  19. 941
  20. 736
  21. 374
  22. 206
  23. 101
  24. 419
  25. 923
  26. 393
  27. 919
  28. 761
  29. 406
  30. 967
  31. 397
  32. 974
  33. 544
  34. 257
  35. 184
  36. 833
  37. 720
  38. 302
  39. 984
  40. 992

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