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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 100 · 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 394 children. 198 of them are girls. How many boys are there?
  2. 2.? + 340 = 913
  3. 3.A train has 271 people in the front coaches and 328 people in the back coaches. How many people are on the train?
  4. 4.? + 228 = 361
  5. 5.A train has 236 people in the front coaches and 495 people in the back coaches. How many people are on the train?
  6. 6.? + 877 = 982
  7. 7.772 + ? = 960
  8. 8.895 − 808 =
  9. 9.? + 337 = 650
  10. 10.868 − 769 =
  11. 11.768 − 217 =
  12. 12.517 + 155 =
  13. 13.644 + 254 =
  14. 14.769 + 144 =
  15. 15.A train has 817 people in the front coaches and 175 people in the back coaches. How many people are on the train?
  16. 16.A train has 463 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  17. 17.608 + 156 =
  18. 18.A school has 673 children. 344 of them are girls. How many boys are there?
  19. 19.340 + ? = 882
  20. 20.595 + 193 =
  21. 21.262 + ? = 674
  22. 22.407 − 217 =
  23. 23.A school has 697 children. 122 of them are girls. How many boys are there?
  24. 24.A train has 261 people in the front coaches and 517 people in the back coaches. How many people are on the train?
  25. 25.A train has 466 people in the front coaches and 451 people in the back coaches. How many people are on the train?
  26. 26.955 − 159 =
  27. 27.581 + ? = 965
  28. 28.A school has 589 children. 355 of them are girls. How many boys are there?
  29. 29.610 − ? = 387
  30. 30.A train has 304 people in the front coaches and 313 people in the back coaches. How many people are on the train?
  31. 31.884 + ? = 986
  32. 32.362 − 202 =
  33. 33.A train has 666 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  34. 34.? − 563 = 364
  35. 35.777 + ? = 980
  36. 36.? − 136 = 406
  37. 37.190 + 752 =
  38. 38.? − 438 = 190
  39. 39.329 − 276 =
  40. 40.890 + ? = 992

Answer key

  1. 196
  2. 573
  3. 599
  4. 133
  5. 731
  6. 105
  7. 188
  8. 87
  9. 313
  10. 99
  11. 551
  12. 672
  13. 898
  14. 913
  15. 992
  16. 569
  17. 764
  18. 329
  19. 542
  20. 788
  21. 412
  22. 190
  23. 575
  24. 778
  25. 917
  26. 796
  27. 384
  28. 234
  29. 223
  30. 617
  31. 102
  32. 160
  33. 793
  34. 927
  35. 203
  36. 542
  37. 942
  38. 628
  39. 53
  40. 102

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