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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 640 · 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. 1.768 + 217 =
  2. 2.? + 291 = 484
  3. 3.A school has 255 children. 241 of them are girls. How many boys are there?
  4. 4.A school has 299 children. 282 of them are girls. How many boys are there?
  5. 5.A train has 307 people in the front coaches and 275 people in the back coaches. How many people are on the train?
  6. 6.854 + ? = 958
  7. 7.686 − 474 =
  8. 8.A train has 429 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  9. 9.771 + 205 =
  10. 10.407 − 332 =
  11. 11.A school has 779 children. 341 of them are girls. How many boys are there?
  12. 12.632 + ? = 802
  13. 13.991 − 142 =
  14. 14.291 − 114 =
  15. 15.260 − 137 =
  16. 16.A school has 367 children. 204 of them are girls. How many boys are there?
  17. 17.? − 423 = 349
  18. 18.A school has 236 children. 188 of them are girls. How many boys are there?
  19. 19.229 + 715 =
  20. 20.239 + 543 =
  21. 21.278 − ? = 131
  22. 22.226 − 101 =
  23. 23.215 − ? = 76
  24. 24.400 + 468 =
  25. 25.216 + 252 =
  26. 26.A school has 601 children. 480 of them are girls. How many boys are there?
  27. 27.479 + 459 =
  28. 28.A school has 575 children. 243 of them are girls. How many boys are there?
  29. 29.342 − 253 =
  30. 30.679 − 503 =
  31. 31.? + 158 = 722
  32. 32.782 + 211 =
  33. 33.A school has 942 children. 727 of them are girls. How many boys are there?
  34. 34.A school has 991 children. 976 of them are girls. How many boys are there?
  35. 35.A train has 241 people in the front coaches and 656 people in the back coaches. How many people are on the train?
  36. 36.432 − ? = 164
  37. 37.A school has 240 children. 104 of them are girls. How many boys are there?
  38. 38.537 − 354 =
  39. 39.A train has 827 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  40. 40.A school has 730 children. 424 of them are girls. How many boys are there?

Answer key

  1. 985
  2. 193
  3. 14
  4. 17
  5. 582
  6. 104
  7. 212
  8. 555
  9. 976
  10. 75
  11. 438
  12. 170
  13. 849
  14. 177
  15. 123
  16. 163
  17. 772
  18. 48
  19. 944
  20. 782
  21. 147
  22. 125
  23. 139
  24. 868
  25. 468
  26. 121
  27. 938
  28. 332
  29. 89
  30. 176
  31. 564
  32. 993
  33. 215
  34. 15
  35. 897
  36. 268
  37. 136
  38. 183
  39. 986
  40. 306

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