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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 485 · 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. 1.710 − ? = 334
  2. 2.A train has 674 people in the front coaches and 247 people in the back coaches. How many people are on the train?
  3. 3.? − 275 = 513
  4. 4.793 + 150 =
  5. 5.? − 264 = 469
  6. 6.A train has 820 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  7. 7.A train has 480 people in the front coaches and 438 people in the back coaches. How many people are on the train?
  8. 8.246 − 149 =
  9. 9.222 − 162 =
  10. 10.467 − 189 =
  11. 11.607 + 320 =
  12. 12.641 + 200 =
  13. 13.? + 400 = 567
  14. 14.A school has 497 children. 330 of them are girls. How many boys are there?
  15. 15.212 + ? = 773
  16. 16.A train has 488 people in the front coaches and 191 people in the back coaches. How many people are on the train?
  17. 17.477 − 458 =
  18. 18.A train has 212 people in the front coaches and 722 people in the back coaches. How many people are on the train?
  19. 19.534 − 368 =
  20. 20.A school has 244 children. 209 of them are girls. How many boys are there?
  21. 21.A train has 833 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  22. 22.286 − 178 =
  23. 23.777 + 174 =
  24. 24.121 + ? = 903
  25. 25.357 − 159 =
  26. 26.? − 748 = 39
  27. 27.502 − 124 =
  28. 28.356 − 125 =
  29. 29.A school has 796 children. 692 of them are girls. How many boys are there?
  30. 30.A train has 738 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  31. 31.A train has 297 people in the front coaches and 580 people in the back coaches. How many people are on the train?
  32. 32.479 + ? = 695
  33. 33.878 − 150 =
  34. 34.935 − ? = 110
  35. 35.A school has 334 children. 146 of them are girls. How many boys are there?
  36. 36.A school has 253 children. 239 of them are girls. How many boys are there?
  37. 37.903 − ? = 143
  38. 38.A train has 662 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  39. 39.992 − 233 =
  40. 40.392 − 259 =

Answer key

  1. 376
  2. 921
  3. 788
  4. 943
  5. 733
  6. 999
  7. 918
  8. 97
  9. 60
  10. 278
  11. 927
  12. 841
  13. 167
  14. 167
  15. 561
  16. 679
  17. 19
  18. 934
  19. 166
  20. 35
  21. 935
  22. 108
  23. 951
  24. 782
  25. 198
  26. 787
  27. 378
  28. 231
  29. 104
  30. 897
  31. 877
  32. 216
  33. 728
  34. 825
  35. 188
  36. 14
  37. 760
  38. 818
  39. 759
  40. 133

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