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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 561 · 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. 1.462 − 274 =
  2. 2.A train has 501 people in the front coaches and 171 people in the back coaches. How many people are on the train?
  3. 3.199 + ? = 380
  4. 4.429 + 236 =
  5. 5.504 + 420 =
  6. 6.575 + 218 =
  7. 7.533 + 129 =
  8. 8.? − 113 = 102
  9. 9.A school has 282 children. 206 of them are girls. How many boys are there?
  10. 10.A train has 611 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  11. 11.648 − 194 =
  12. 12.A school has 753 children. 587 of them are girls. How many boys are there?
  13. 13.A school has 433 children. 218 of them are girls. How many boys are there?
  14. 14.A train has 613 people in the front coaches and 383 people in the back coaches. How many people are on the train?
  15. 15.A school has 853 children. 683 of them are girls. How many boys are there?
  16. 16.241 − 100 =
  17. 17.A train has 136 people in the front coaches and 252 people in the back coaches. How many people are on the train?
  18. 18.? − 349 = 122
  19. 19.263 + 514 =
  20. 20.158 + 835 =
  21. 21.? + 227 = 451
  22. 22.375 − 252 =
  23. 23.A school has 225 children. 104 of them are girls. How many boys are there?
  24. 24.A school has 238 children. 124 of them are girls. How many boys are there?
  25. 25.802 + 104 =
  26. 26.881 − 845 =
  27. 27.568 + ? = 967
  28. 28.134 + ? = 779
  29. 29.? + 577 = 713
  30. 30.139 + ? = 361
  31. 31.849 − ? = 364
  32. 32.A school has 433 children. 400 of them are girls. How many boys are there?
  33. 33.A school has 214 children. 213 of them are girls. How many boys are there?
  34. 34.333 − ? = 115
  35. 35.A train has 563 people in the front coaches and 298 people in the back coaches. How many people are on the train?
  36. 36.A school has 210 children. 172 of them are girls. How many boys are there?
  37. 37.224 − 164 =
  38. 38.857 + 125 =
  39. 39.866 + 133 =
  40. 40.848 − ? = 438

Answer key

  1. 188
  2. 672
  3. 181
  4. 665
  5. 924
  6. 793
  7. 662
  8. 215
  9. 76
  10. 720
  11. 454
  12. 166
  13. 215
  14. 996
  15. 170
  16. 141
  17. 388
  18. 471
  19. 777
  20. 993
  21. 224
  22. 123
  23. 121
  24. 114
  25. 906
  26. 36
  27. 399
  28. 645
  29. 136
  30. 222
  31. 485
  32. 33
  33. 1
  34. 218
  35. 861
  36. 38
  37. 60
  38. 982
  39. 999
  40. 410

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