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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 558 · 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 237 children. 188 of them are girls. How many boys are there?
  2. 2.A train has 456 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  3. 3.A train has 280 people in the front coaches and 440 people in the back coaches. How many people are on the train?
  4. 4.368 − 218 =
  5. 5.990 − 487 =
  6. 6.689 − 204 =
  7. 7.293 − 146 =
  8. 8.891 + 107 =
  9. 9.514 − ? = 244
  10. 10.A train has 210 people in the front coaches and 284 people in the back coaches. How many people are on the train?
  11. 11.264 + ? = 425
  12. 12.A school has 818 children. 344 of them are girls. How many boys are there?
  13. 13.396 + ? = 770
  14. 14.198 + 251 =
  15. 15.A school has 873 children. 239 of them are girls. How many boys are there?
  16. 16.189 + ? = 503
  17. 17.209 − 192 =
  18. 18.385 − 227 =
  19. 19.A school has 436 children. 244 of them are girls. How many boys are there?
  20. 20.? − 198 = 230
  21. 21.357 + ? = 478
  22. 22.? − 387 = 96
  23. 23.A school has 926 children. 783 of them are girls. How many boys are there?
  24. 24.A train has 185 people in the front coaches and 515 people in the back coaches. How many people are on the train?
  25. 25.463 − 302 =
  26. 26.A train has 598 people in the front coaches and 312 people in the back coaches. How many people are on the train?
  27. 27.981 − 965 =
  28. 28.? + 768 = 940
  29. 29.454 + 116 =
  30. 30.468 + 467 =
  31. 31.272 + 392 =
  32. 32.A train has 436 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  33. 33.A school has 716 children. 281 of them are girls. How many boys are there?
  34. 34.686 − 259 =
  35. 35.A train has 193 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  36. 36.? + 899 = 999
  37. 37.A train has 528 people in the front coaches and 434 people in the back coaches. How many people are on the train?
  38. 38.A train has 702 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  39. 39.932 − 256 =
  40. 40.A train has 785 people in the front coaches and 182 people in the back coaches. How many people are on the train?

Answer key

  1. 49
  2. 602
  3. 720
  4. 150
  5. 503
  6. 485
  7. 147
  8. 998
  9. 270
  10. 494
  11. 161
  12. 474
  13. 374
  14. 449
  15. 634
  16. 314
  17. 17
  18. 158
  19. 192
  20. 428
  21. 121
  22. 483
  23. 143
  24. 700
  25. 161
  26. 910
  27. 16
  28. 172
  29. 570
  30. 935
  31. 664
  32. 583
  33. 435
  34. 427
  35. 304
  36. 100
  37. 962
  38. 870
  39. 676
  40. 967

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