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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 518 · 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. 1.325 + 546 =
  2. 2.? + 602 = 765
  3. 3.A train has 697 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  4. 4.718 − 400 =
  5. 5.872 − 838 =
  6. 6.845 − 497 =
  7. 7.376 + 295 =
  8. 8.A train has 342 people in the front coaches and 326 people in the back coaches. How many people are on the train?
  9. 9.250 + ? = 520
  10. 10.495 − ? = 196
  11. 11.A train has 600 people in the front coaches and 198 people in the back coaches. How many people are on the train?
  12. 12.A school has 742 children. 355 of them are girls. How many boys are there?
  13. 13.323 + 644 =
  14. 14.A school has 300 children. 113 of them are girls. How many boys are there?
  15. 15.622 + 174 =
  16. 16.515 − 136 =
  17. 17.247 + 446 =
  18. 18.A school has 264 children. 206 of them are girls. How many boys are there?
  19. 19.A school has 849 children. 196 of them are girls. How many boys are there?
  20. 20.A school has 641 children. 167 of them are girls. How many boys are there?
  21. 21.302 − ? = 164
  22. 22.A school has 374 children. 298 of them are girls. How many boys are there?
  23. 23.431 + 555 =
  24. 24.757 + ? = 858
  25. 25.278 + 244 =
  26. 26.568 − ? = 394
  27. 27.A school has 586 children. 223 of them are girls. How many boys are there?
  28. 28.992 − 434 =
  29. 29.254 − 137 =
  30. 30.121 + ? = 731
  31. 31.700 + 209 =
  32. 32.A school has 602 children. 371 of them are girls. How many boys are there?
  33. 33.489 + ? = 680
  34. 34.? − 261 = 433
  35. 35.A school has 524 children. 342 of them are girls. How many boys are there?
  36. 36.A train has 492 people in the front coaches and 181 people in the back coaches. How many people are on the train?
  37. 37.962 − 266 =
  38. 38.813 + 101 =
  39. 39.469 − 454 =
  40. 40.684 + ? = 840

Answer key

  1. 871
  2. 163
  3. 815
  4. 318
  5. 34
  6. 348
  7. 671
  8. 668
  9. 270
  10. 299
  11. 798
  12. 387
  13. 967
  14. 187
  15. 796
  16. 379
  17. 693
  18. 58
  19. 653
  20. 474
  21. 138
  22. 76
  23. 986
  24. 101
  25. 522
  26. 174
  27. 363
  28. 558
  29. 117
  30. 610
  31. 909
  32. 231
  33. 191
  34. 694
  35. 182
  36. 673
  37. 696
  38. 914
  39. 15
  40. 156

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