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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 482 · 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. 1.560 − 299 =
  2. 2.A train has 652 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  3. 3.A school has 458 children. 314 of them are girls. How many boys are there?
  4. 4.A school has 329 children. 119 of them are girls. How many boys are there?
  5. 5.759 + ? = 975
  6. 6.782 + ? = 997
  7. 7.451 + 429 =
  8. 8.A school has 434 children. 359 of them are girls. How many boys are there?
  9. 9.621 − 156 =
  10. 10.A train has 710 people in the front coaches and 205 people in the back coaches. How many people are on the train?
  11. 11.? − 156 = 204
  12. 12.A school has 201 children. 100 of them are girls. How many boys are there?
  13. 13.350 − ? = 21
  14. 14.503 + 292 =
  15. 15.? − 470 = 269
  16. 16.A train has 617 people in the front coaches and 303 people in the back coaches. How many people are on the train?
  17. 17.A school has 919 children. 600 of them are girls. How many boys are there?
  18. 18.878 + 115 =
  19. 19.? − 249 = 85
  20. 20.556 − 512 =
  21. 21.A train has 476 people in the front coaches and 207 people in the back coaches. How many people are on the train?
  22. 22.? − 605 = 270
  23. 23.757 + 163 =
  24. 24.A train has 737 people in the front coaches and 245 people in the back coaches. How many people are on the train?
  25. 25.899 + 100 =
  26. 26.569 − ? = 79
  27. 27.775 − 250 =
  28. 28.502 + ? = 691
  29. 29.? + 668 = 773
  30. 30.A train has 309 people in the front coaches and 522 people in the back coaches. How many people are on the train?
  31. 31.A school has 225 children. 132 of them are girls. How many boys are there?
  32. 32.? − 383 = 218
  33. 33.? − 267 = 170
  34. 34.A train has 237 people in the front coaches and 276 people in the back coaches. How many people are on the train?
  35. 35.A school has 672 children. 516 of them are girls. How many boys are there?
  36. 36.? − 449 = 117
  37. 37.898 − ? = 782
  38. 38.A school has 487 children. 178 of them are girls. How many boys are there?
  39. 39.A school has 574 children. 118 of them are girls. How many boys are there?
  40. 40.A train has 206 people in the front coaches and 373 people in the back coaches. How many people are on the train?

Answer key

  1. 261
  2. 790
  3. 144
  4. 210
  5. 216
  6. 215
  7. 880
  8. 75
  9. 465
  10. 915
  11. 360
  12. 101
  13. 329
  14. 795
  15. 739
  16. 920
  17. 319
  18. 993
  19. 334
  20. 44
  21. 683
  22. 875
  23. 920
  24. 982
  25. 999
  26. 490
  27. 525
  28. 189
  29. 105
  30. 831
  31. 93
  32. 601
  33. 437
  34. 513
  35. 156
  36. 566
  37. 116
  38. 309
  39. 456
  40. 579

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