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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 5 · 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.? + 229 = 440
  2. 2.A school has 960 children. 860 of them are girls. How many boys are there?
  3. 3.410 − 146 =
  4. 4.845 + 124 =
  5. 5.A train has 194 people in the front coaches and 442 people in the back coaches. How many people are on the train?
  6. 6.748 + ? = 903
  7. 7.A train has 719 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  8. 8.689 − ? = 435
  9. 9.A train has 300 people in the front coaches and 676 people in the back coaches. How many people are on the train?
  10. 10.653 − 216 =
  11. 11.A school has 789 children. 248 of them are girls. How many boys are there?
  12. 12.755 + 193 =
  13. 13.730 − ? = 397
  14. 14.A train has 209 people in the front coaches and 716 people in the back coaches. How many people are on the train?
  15. 15.? + 508 = 756
  16. 16.988 − 316 =
  17. 17.639 + 134 =
  18. 18.425 − 169 =
  19. 19.A train has 844 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  20. 20.? + 494 = 859
  21. 21.A school has 888 children. 617 of them are girls. How many boys are there?
  22. 22.788 − 400 =
  23. 23.493 − ? = 239
  24. 24.? − 128 = 323
  25. 25.662 + 105 =
  26. 26.A train has 242 people in the front coaches and 348 people in the back coaches. How many people are on the train?
  27. 27.A school has 697 children. 531 of them are girls. How many boys are there?
  28. 28.A train has 388 people in the front coaches and 422 people in the back coaches. How many people are on the train?
  29. 29.324 + ? = 556
  30. 30.258 − 177 =
  31. 31.844 − 398 =
  32. 32.417 + 182 =
  33. 33.595 − ? = 106
  34. 34.446 − 353 =
  35. 35.384 + ? = 921
  36. 36.A train has 248 people in the front coaches and 602 people in the back coaches. How many people are on the train?
  37. 37.796 + 184 =
  38. 38.? + 680 = 831
  39. 39.A school has 587 children. 218 of them are girls. How many boys are there?
  40. 40.? − 282 = 588

Answer key

  1. 211
  2. 100
  3. 264
  4. 969
  5. 636
  6. 155
  7. 954
  8. 254
  9. 976
  10. 437
  11. 541
  12. 948
  13. 333
  14. 925
  15. 248
  16. 672
  17. 773
  18. 256
  19. 970
  20. 365
  21. 271
  22. 388
  23. 254
  24. 451
  25. 767
  26. 590
  27. 166
  28. 810
  29. 232
  30. 81
  31. 446
  32. 599
  33. 489
  34. 93
  35. 537
  36. 850
  37. 980
  38. 151
  39. 369
  40. 870

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