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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 327 · 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. 1.114 + ? = 380
  2. 2.? − 269 = 580
  3. 3.? − 209 = 102
  4. 4.205 − 176 =
  5. 5.572 + 241 =
  6. 6.A train has 316 people in the front coaches and 212 people in the back coaches. How many people are on the train?
  7. 7.A school has 258 children. 115 of them are girls. How many boys are there?
  8. 8.421 + 149 =
  9. 9.A school has 770 children. 441 of them are girls. How many boys are there?
  10. 10.663 − 421 =
  11. 11.A school has 367 children. 282 of them are girls. How many boys are there?
  12. 12.775 + ? = 947
  13. 13.292 + 580 =
  14. 14.A school has 660 children. 371 of them are girls. How many boys are there?
  15. 15.A school has 390 children. 187 of them are girls. How many boys are there?
  16. 16.A train has 542 people in the front coaches and 379 people in the back coaches. How many people are on the train?
  17. 17.A train has 361 people in the front coaches and 637 people in the back coaches. How many people are on the train?
  18. 18.320 + 605 =
  19. 19.849 − ? = 465
  20. 20.A train has 309 people in the front coaches and 675 people in the back coaches. How many people are on the train?
  21. 21.? − 175 = 41
  22. 22.746 + 224 =
  23. 23.781 − 418 =
  24. 24.A train has 528 people in the front coaches and 161 people in the back coaches. How many people are on the train?
  25. 25.426 − 300 =
  26. 26.292 + ? = 477
  27. 27.467 − 326 =
  28. 28.730 − 311 =
  29. 29.510 + ? = 867
  30. 30.875 − ? = 181
  31. 31.A train has 291 people in the front coaches and 406 people in the back coaches. How many people are on the train?
  32. 32.A school has 460 children. 295 of them are girls. How many boys are there?
  33. 33.? + 581 = 834
  34. 34.? − 145 = 169
  35. 35.? + 280 = 944
  36. 36.A school has 261 children. 165 of them are girls. How many boys are there?
  37. 37.881 − 349 =
  38. 38.A school has 364 children. 230 of them are girls. How many boys are there?
  39. 39.? + 376 = 483
  40. 40.820 + 164 =

Answer key

  1. 266
  2. 849
  3. 311
  4. 29
  5. 813
  6. 528
  7. 143
  8. 570
  9. 329
  10. 242
  11. 85
  12. 172
  13. 872
  14. 289
  15. 203
  16. 921
  17. 998
  18. 925
  19. 384
  20. 984
  21. 216
  22. 970
  23. 363
  24. 689
  25. 126
  26. 185
  27. 141
  28. 419
  29. 357
  30. 694
  31. 697
  32. 165
  33. 253
  34. 314
  35. 664
  36. 96
  37. 532
  38. 134
  39. 107
  40. 984

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