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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 35 · 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. 1.356 − 175 =
  2. 2.A train has 111 people in the front coaches and 205 people in the back coaches. How many people are on the train?
  3. 3.502 + 165 =
  4. 4.343 − 333 =
  5. 5.? + 728 = 949
  6. 6.580 − 327 =
  7. 7.662 + ? = 885
  8. 8.A school has 705 children. 536 of them are girls. How many boys are there?
  9. 9.A school has 613 children. 202 of them are girls. How many boys are there?
  10. 10.A school has 644 children. 164 of them are girls. How many boys are there?
  11. 11.A school has 296 children. 161 of them are girls. How many boys are there?
  12. 12.954 − 381 =
  13. 13.A train has 526 people in the front coaches and 325 people in the back coaches. How many people are on the train?
  14. 14.273 − 259 =
  15. 15.749 + 144 =
  16. 16.? − 335 = 335
  17. 17.? + 810 = 964
  18. 18.A school has 718 children. 423 of them are girls. How many boys are there?
  19. 19.813 − 284 =
  20. 20.A train has 298 people in the front coaches and 463 people in the back coaches. How many people are on the train?
  21. 21.827 + ? = 949
  22. 22.478 − 420 =
  23. 23.A school has 541 children. 342 of them are girls. How many boys are there?
  24. 24.A school has 457 children. 139 of them are girls. How many boys are there?
  25. 25.A school has 849 children. 156 of them are girls. How many boys are there?
  26. 26.A train has 199 people in the front coaches and 786 people in the back coaches. How many people are on the train?
  27. 27.400 − 245 =
  28. 28.549 + 277 =
  29. 29.210 + ? = 813
  30. 30.637 + ? = 754
  31. 31.? − 176 = 44
  32. 32.265 + ? = 633
  33. 33.456 − ? = 95
  34. 34.? − 295 = 44
  35. 35.289 − 244 =
  36. 36.405 − 303 =
  37. 37.478 + 108 =
  38. 38.A school has 434 children. 396 of them are girls. How many boys are there?
  39. 39.213 − 153 =
  40. 40.A school has 491 children. 378 of them are girls. How many boys are there?

Answer key

  1. 181
  2. 316
  3. 667
  4. 10
  5. 221
  6. 253
  7. 223
  8. 169
  9. 411
  10. 480
  11. 135
  12. 573
  13. 851
  14. 14
  15. 893
  16. 670
  17. 154
  18. 295
  19. 529
  20. 761
  21. 122
  22. 58
  23. 199
  24. 318
  25. 693
  26. 985
  27. 155
  28. 826
  29. 603
  30. 117
  31. 220
  32. 368
  33. 361
  34. 339
  35. 45
  36. 102
  37. 586
  38. 38
  39. 60
  40. 113

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