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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 871 · 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.? + 261 = 752
  2. 2.845 + 134 =
  3. 3.A school has 255 children. 153 of them are girls. How many boys are there?
  4. 4.434 − 331 =
  5. 5.619 + ? = 851
  6. 6.A school has 602 children. 166 of them are girls. How many boys are there?
  7. 7.A school has 765 children. 566 of them are girls. How many boys are there?
  8. 8.688 + 183 =
  9. 9.? + 818 = 924
  10. 10.777 + 112 =
  11. 11.A train has 799 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  12. 12.A train has 284 people in the front coaches and 170 people in the back coaches. How many people are on the train?
  13. 13.284 + 205 =
  14. 14.? + 619 = 976
  15. 15.890 + ? = 998
  16. 16.A school has 866 children. 806 of them are girls. How many boys are there?
  17. 17.807 − 563 =
  18. 18.? + 673 = 840
  19. 19.A school has 757 children. 280 of them are girls. How many boys are there?
  20. 20.863 − 401 =
  21. 21.A school has 911 children. 294 of them are girls. How many boys are there?
  22. 22.A school has 925 children. 523 of them are girls. How many boys are there?
  23. 23.340 + ? = 919
  24. 24.422 − 101 =
  25. 25.183 + ? = 320
  26. 26.A school has 513 children. 497 of them are girls. How many boys are there?
  27. 27.633 − 610 =
  28. 28.A school has 394 children. 255 of them are girls. How many boys are there?
  29. 29.805 + ? = 968
  30. 30.A train has 212 people in the front coaches and 298 people in the back coaches. How many people are on the train?
  31. 31.242 − 157 =
  32. 32.982 − 701 =
  33. 33.A school has 494 children. 150 of them are girls. How many boys are there?
  34. 34.659 + ? = 879
  35. 35.? − 270 = 544
  36. 36.A train has 266 people in the front coaches and 580 people in the back coaches. How many people are on the train?
  37. 37.343 − 323 =
  38. 38.A train has 545 people in the front coaches and 211 people in the back coaches. How many people are on the train?
  39. 39.A train has 203 people in the front coaches and 421 people in the back coaches. How many people are on the train?
  40. 40.688 + 197 =

Answer key

  1. 491
  2. 979
  3. 102
  4. 103
  5. 232
  6. 436
  7. 199
  8. 871
  9. 106
  10. 889
  11. 914
  12. 454
  13. 489
  14. 357
  15. 108
  16. 60
  17. 244
  18. 167
  19. 477
  20. 462
  21. 617
  22. 402
  23. 579
  24. 321
  25. 137
  26. 16
  27. 23
  28. 139
  29. 163
  30. 510
  31. 85
  32. 281
  33. 344
  34. 220
  35. 814
  36. 846
  37. 20
  38. 756
  39. 624
  40. 885

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