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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 2 · 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. 1.236 − 124 =
  2. 2.864 − 792 =
  3. 3.A train has 131 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  4. 4.? + 799 = 967
  5. 5.? + 216 = 497
  6. 6.105 + 218 =
  7. 7.A train has 672 people in the front coaches and 205 people in the back coaches. How many people are on the train?
  8. 8.865 − 740 =
  9. 9.A school has 402 children. 109 of them are girls. How many boys are there?
  10. 10.847 − ? = 302
  11. 11.245 + ? = 987
  12. 12.742 − 711 =
  13. 13.A train has 568 people in the front coaches and 302 people in the back coaches. How many people are on the train?
  14. 14.896 + 103 =
  15. 15.413 − 369 =
  16. 16.625 + 156 =
  17. 17.A school has 353 children. 273 of them are girls. How many boys are there?
  18. 18.791 + 111 =
  19. 19.779 + 210 =
  20. 20.356 − ? = 100
  21. 21.A train has 171 people in the front coaches and 261 people in the back coaches. How many people are on the train?
  22. 22.484 + ? = 949
  23. 23.761 + 134 =
  24. 24.A train has 493 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  25. 25.487 + 411 =
  26. 26.A train has 250 people in the front coaches and 116 people in the back coaches. How many people are on the train?
  27. 27.A train has 542 people in the front coaches and 188 people in the back coaches. How many people are on the train?
  28. 28.628 + 307 =
  29. 29.926 − 101 =
  30. 30.171 + ? = 735
  31. 31.A school has 619 children. 204 of them are girls. How many boys are there?
  32. 32.A school has 714 children. 127 of them are girls. How many boys are there?
  33. 33.211 − 147 =
  34. 34.660 + 262 =
  35. 35.? − 295 = 41
  36. 36.319 + ? = 653
  37. 37.248 + 135 =
  38. 38.543 − ? = 242
  39. 39.453 − 150 =
  40. 40.A school has 497 children. 278 of them are girls. How many boys are there?

Answer key

  1. 112
  2. 72
  3. 290
  4. 168
  5. 281
  6. 323
  7. 877
  8. 125
  9. 293
  10. 545
  11. 742
  12. 31
  13. 870
  14. 999
  15. 44
  16. 781
  17. 80
  18. 902
  19. 989
  20. 256
  21. 432
  22. 465
  23. 895
  24. 609
  25. 898
  26. 366
  27. 730
  28. 935
  29. 825
  30. 564
  31. 415
  32. 587
  33. 64
  34. 922
  35. 336
  36. 334
  37. 383
  38. 301
  39. 303
  40. 219

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