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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 934 · 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.? − 193 = 164
  2. 2.A school has 738 children. 306 of them are girls. How many boys are there?
  3. 3.A train has 331 people in the front coaches and 135 people in the back coaches. How many people are on the train?
  4. 4.? + 337 = 813
  5. 5.582 + 355 =
  6. 6.864 − ? = 212
  7. 7.502 − ? = 208
  8. 8.? + 130 = 919
  9. 9.A school has 315 children. 184 of them are girls. How many boys are there?
  10. 10.229 − 146 =
  11. 11.? + 721 = 838
  12. 12.A school has 694 children. 510 of them are girls. How many boys are there?
  13. 13.? + 122 = 950
  14. 14.856 − ? = 735
  15. 15.577 + ? = 687
  16. 16.659 − 188 =
  17. 17.529 − ? = 132
  18. 18.A train has 719 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  19. 19.? − 235 = 307
  20. 20.521 − 478 =
  21. 21.325 + ? = 750
  22. 22.A train has 478 people in the front coaches and 360 people in the back coaches. How many people are on the train?
  23. 23.140 + ? = 265
  24. 24.233 + ? = 870
  25. 25.713 − 147 =
  26. 26.511 − 508 =
  27. 27.461 + 531 =
  28. 28.203 − ? = 89
  29. 29.764 − 241 =
  30. 30.878 − 744 =
  31. 31.564 − 422 =
  32. 32.672 − 581 =
  33. 33.? − 350 = 435
  34. 34.A train has 462 people in the front coaches and 324 people in the back coaches. How many people are on the train?
  35. 35.A train has 609 people in the front coaches and 272 people in the back coaches. How many people are on the train?
  36. 36.A school has 260 children. 137 of them are girls. How many boys are there?
  37. 37.330 − 186 =
  38. 38.955 − 388 =
  39. 39.? − 319 = 161
  40. 40.382 + 254 =

Answer key

  1. 357
  2. 432
  3. 466
  4. 476
  5. 937
  6. 652
  7. 294
  8. 789
  9. 131
  10. 83
  11. 117
  12. 184
  13. 828
  14. 121
  15. 110
  16. 471
  17. 397
  18. 821
  19. 542
  20. 43
  21. 425
  22. 838
  23. 125
  24. 637
  25. 566
  26. 3
  27. 992
  28. 114
  29. 523
  30. 134
  31. 142
  32. 91
  33. 785
  34. 786
  35. 881
  36. 123
  37. 144
  38. 567
  39. 480
  40. 636

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