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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 676 · 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. 1.222 + 167 =
  2. 2.A train has 745 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  3. 3.846 + 131 =
  4. 4.737 + 237 =
  5. 5.A school has 409 children. 111 of them are girls. How many boys are there?
  6. 6.A school has 314 children. 119 of them are girls. How many boys are there?
  7. 7.A school has 326 children. 152 of them are girls. How many boys are there?
  8. 8.A train has 476 people in the front coaches and 447 people in the back coaches. How many people are on the train?
  9. 9.? + 302 = 637
  10. 10.? + 440 = 704
  11. 11.A school has 289 children. 271 of them are girls. How many boys are there?
  12. 12.A train has 529 people in the front coaches and 205 people in the back coaches. How many people are on the train?
  13. 13.A train has 196 people in the front coaches and 486 people in the back coaches. How many people are on the train?
  14. 14.297 − 198 =
  15. 15.? − 235 = 288
  16. 16.427 − ? = 44
  17. 17.540 − 495 =
  18. 18.A school has 491 children. 268 of them are girls. How many boys are there?
  19. 19.417 − 363 =
  20. 20.A school has 984 children. 633 of them are girls. How many boys are there?
  21. 21.275 − ? = 39
  22. 22.? − 397 = 454
  23. 23.A school has 645 children. 124 of them are girls. How many boys are there?
  24. 24.541 + 252 =
  25. 25.866 − 616 =
  26. 26.A train has 102 people in the front coaches and 332 people in the back coaches. How many people are on the train?
  27. 27.A train has 592 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  28. 28.426 − 354 =
  29. 29.? + 393 = 874
  30. 30.561 − ? = 189
  31. 31.864 − 621 =
  32. 32.? − 395 = 303
  33. 33.A train has 323 people in the front coaches and 656 people in the back coaches. How many people are on the train?
  34. 34.A school has 651 children. 557 of them are girls. How many boys are there?
  35. 35.630 − 383 =
  36. 36.889 + 100 =
  37. 37.606 + ? = 977
  38. 38.292 + 595 =
  39. 39.340 + 264 =
  40. 40.705 − 468 =

Answer key

  1. 389
  2. 897
  3. 977
  4. 974
  5. 298
  6. 195
  7. 174
  8. 923
  9. 335
  10. 264
  11. 18
  12. 734
  13. 682
  14. 99
  15. 523
  16. 383
  17. 45
  18. 223
  19. 54
  20. 351
  21. 236
  22. 851
  23. 521
  24. 793
  25. 250
  26. 434
  27. 751
  28. 72
  29. 481
  30. 372
  31. 243
  32. 698
  33. 979
  34. 94
  35. 247
  36. 989
  37. 371
  38. 887
  39. 604
  40. 237

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