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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 549 · 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. 1.293 + ? = 419
  2. 2.905 − ? = 786
  3. 3.468 + 327 =
  4. 4.A train has 147 people in the front coaches and 342 people in the back coaches. How many people are on the train?
  5. 5.A school has 763 children. 188 of them are girls. How many boys are there?
  6. 6.494 − ? = 368
  7. 7.697 + 225 =
  8. 8.425 + 217 =
  9. 9.256 + 357 =
  10. 10.463 − 261 =
  11. 11.758 + 181 =
  12. 12.245 − ? = 131
  13. 13.A school has 914 children. 109 of them are girls. How many boys are there?
  14. 14.721 + ? = 965
  15. 15.A train has 756 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  16. 16.136 + 203 =
  17. 17.554 − ? = 352
  18. 18.? − 191 = 53
  19. 19.? − 191 = 181
  20. 20.A train has 334 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  21. 21.A train has 488 people in the front coaches and 134 people in the back coaches. How many people are on the train?
  22. 22.A school has 628 children. 246 of them are girls. How many boys are there?
  23. 23.460 + 425 =
  24. 24.A train has 300 people in the front coaches and 347 people in the back coaches. How many people are on the train?
  25. 25.380 + 240 =
  26. 26.481 − ? = 44
  27. 27.? − 384 = 22
  28. 28.A train has 675 people in the front coaches and 222 people in the back coaches. How many people are on the train?
  29. 29.913 − ? = 325
  30. 30.A school has 241 children. 190 of them are girls. How many boys are there?
  31. 31.A school has 456 children. 390 of them are girls. How many boys are there?
  32. 32.A train has 186 people in the front coaches and 310 people in the back coaches. How many people are on the train?
  33. 33.909 − ? = 483
  34. 34.580 + 160 =
  35. 35.296 + 221 =
  36. 36.543 + 137 =
  37. 37.696 − 367 =
  38. 38.112 + ? = 368
  39. 39.879 − 758 =
  40. 40.? − 266 = 269

Answer key

  1. 126
  2. 119
  3. 795
  4. 489
  5. 575
  6. 126
  7. 922
  8. 642
  9. 613
  10. 202
  11. 939
  12. 114
  13. 805
  14. 244
  15. 861
  16. 339
  17. 202
  18. 244
  19. 372
  20. 483
  21. 622
  22. 382
  23. 885
  24. 647
  25. 620
  26. 437
  27. 406
  28. 897
  29. 588
  30. 51
  31. 66
  32. 496
  33. 426
  34. 740
  35. 517
  36. 680
  37. 329
  38. 256
  39. 121
  40. 535

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