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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 555 · 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. 1.379 − ? = 247
  2. 2.598 − 213 =
  3. 3.103 + 756 =
  4. 4.A train has 523 people in the front coaches and 190 people in the back coaches. How many people are on the train?
  5. 5.330 + 475 =
  6. 6.555 − ? = 360
  7. 7.728 + 197 =
  8. 8.A school has 645 children. 322 of them are girls. How many boys are there?
  9. 9.A school has 258 children. 138 of them are girls. How many boys are there?
  10. 10.648 − 113 =
  11. 11.128 + 775 =
  12. 12.? + 142 = 705
  13. 13.126 + ? = 356
  14. 14.A train has 890 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  15. 15.? − 204 = 102
  16. 16.125 + ? = 959
  17. 17.A school has 230 children. 199 of them are girls. How many boys are there?
  18. 18.A school has 436 children. 175 of them are girls. How many boys are there?
  19. 19.A school has 940 children. 304 of them are girls. How many boys are there?
  20. 20.353 − 291 =
  21. 21.? + 783 = 954
  22. 22.434 − 196 =
  23. 23.A school has 643 children. 162 of them are girls. How many boys are there?
  24. 24.454 + 195 =
  25. 25.154 + 119 =
  26. 26.260 + 183 =
  27. 27.633 − ? = 521
  28. 28.884 − ? = 433
  29. 29.A school has 730 children. 103 of them are girls. How many boys are there?
  30. 30.A train has 329 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  31. 31.255 − ? = 91
  32. 32.A train has 789 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  33. 33.163 + 445 =
  34. 34.? + 749 = 891
  35. 35.? − 212 = 199
  36. 36.A school has 834 children. 277 of them are girls. How many boys are there?
  37. 37.A train has 443 people in the front coaches and 322 people in the back coaches. How many people are on the train?
  38. 38.468 − 244 =
  39. 39.A train has 838 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  40. 40.A train has 226 people in the front coaches and 119 people in the back coaches. How many people are on the train?

Answer key

  1. 132
  2. 385
  3. 859
  4. 713
  5. 805
  6. 195
  7. 925
  8. 323
  9. 120
  10. 535
  11. 903
  12. 563
  13. 230
  14. 991
  15. 306
  16. 834
  17. 31
  18. 261
  19. 636
  20. 62
  21. 171
  22. 238
  23. 481
  24. 649
  25. 273
  26. 443
  27. 112
  28. 451
  29. 627
  30. 476
  31. 164
  32. 928
  33. 608
  34. 142
  35. 411
  36. 557
  37. 765
  38. 224
  39. 977
  40. 345

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