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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 854 · 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. 1.207 − 103 =
  2. 2.A train has 169 people in the front coaches and 177 people in the back coaches. How many people are on the train?
  3. 3.566 − 110 =
  4. 4.A school has 980 children. 785 of them are girls. How many boys are there?
  5. 5.834 − 232 =
  6. 6.385 − 243 =
  7. 7.368 − 340 =
  8. 8.210 − ? = 21
  9. 9.A train has 171 people in the front coaches and 619 people in the back coaches. How many people are on the train?
  10. 10.642 − ? = 337
  11. 11.? + 484 = 613
  12. 12.489 − 226 =
  13. 13.A train has 324 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  14. 14.865 + ? = 973
  15. 15.487 + ? = 972
  16. 16.? + 719 = 916
  17. 17.317 − 252 =
  18. 18.A train has 306 people in the front coaches and 448 people in the back coaches. How many people are on the train?
  19. 19.861 + 124 =
  20. 20.A school has 214 children. 170 of them are girls. How many boys are there?
  21. 21.A school has 690 children. 453 of them are girls. How many boys are there?
  22. 22.367 + 164 =
  23. 23.? + 862 = 973
  24. 24.A train has 136 people in the front coaches and 245 people in the back coaches. How many people are on the train?
  25. 25.392 − 340 =
  26. 26.898 + ? = 999
  27. 27.A school has 239 children. 125 of them are girls. How many boys are there?
  28. 28.A school has 920 children. 641 of them are girls. How many boys are there?
  29. 29.662 + 154 =
  30. 30.323 + ? = 632
  31. 31.A school has 539 children. 117 of them are girls. How many boys are there?
  32. 32.536 − ? = 57
  33. 33.616 − 100 =
  34. 34.555 + 101 =
  35. 35.815 + 124 =
  36. 36.875 − 354 =
  37. 37.541 − 298 =
  38. 38.349 − 295 =
  39. 39.522 + 225 =
  40. 40.? + 267 = 644

Answer key

  1. 104
  2. 346
  3. 456
  4. 195
  5. 602
  6. 142
  7. 28
  8. 189
  9. 790
  10. 305
  11. 129
  12. 263
  13. 601
  14. 108
  15. 485
  16. 197
  17. 65
  18. 754
  19. 985
  20. 44
  21. 237
  22. 531
  23. 111
  24. 381
  25. 52
  26. 101
  27. 114
  28. 279
  29. 816
  30. 309
  31. 422
  32. 479
  33. 516
  34. 656
  35. 939
  36. 521
  37. 243
  38. 54
  39. 747
  40. 377

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