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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 852 · 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. 1.341 − 225 =
  2. 2.771 − 495 =
  3. 3.301 − 234 =
  4. 4.? + 701 = 919
  5. 5.A train has 547 people in the front coaches and 153 people in the back coaches. How many people are on the train?
  6. 6.A school has 881 children. 364 of them are girls. How many boys are there?
  7. 7.A train has 281 people in the front coaches and 148 people in the back coaches. How many people are on the train?
  8. 8.? + 248 = 896
  9. 9.A train has 297 people in the front coaches and 557 people in the back coaches. How many people are on the train?
  10. 10.A train has 198 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  11. 11.370 − 283 =
  12. 12.A school has 707 children. 680 of them are girls. How many boys are there?
  13. 13.? + 156 = 739
  14. 14.A train has 506 people in the front coaches and 437 people in the back coaches. How many people are on the train?
  15. 15.785 − ? = 677
  16. 16.814 − ? = 259
  17. 17.A school has 366 children. 184 of them are girls. How many boys are there?
  18. 18.328 + 272 =
  19. 19.A train has 832 people in the front coaches and 161 people in the back coaches. How many people are on the train?
  20. 20.589 − ? = 145
  21. 21.368 − 180 =
  22. 22.737 + ? = 854
  23. 23.882 − 869 =
  24. 24.A train has 119 people in the front coaches and 586 people in the back coaches. How many people are on the train?
  25. 25.347 − 216 =
  26. 26.458 + ? = 948
  27. 27.? + 324 = 662
  28. 28.660 + ? = 826
  29. 29.A school has 390 children. 271 of them are girls. How many boys are there?
  30. 30.A train has 138 people in the front coaches and 563 people in the back coaches. How many people are on the train?
  31. 31.191 + ? = 453
  32. 32.491 + ? = 765
  33. 33.? − 161 = 39
  34. 34.337 + 493 =
  35. 35.774 + 190 =
  36. 36.149 + 366 =
  37. 37.363 − ? = 249
  38. 38.A school has 920 children. 378 of them are girls. How many boys are there?
  39. 39.A school has 845 children. 831 of them are girls. How many boys are there?
  40. 40.146 + 537 =

Answer key

  1. 116
  2. 276
  3. 67
  4. 218
  5. 700
  6. 517
  7. 429
  8. 648
  9. 854
  10. 317
  11. 87
  12. 27
  13. 583
  14. 943
  15. 108
  16. 555
  17. 182
  18. 600
  19. 993
  20. 444
  21. 188
  22. 117
  23. 13
  24. 705
  25. 131
  26. 490
  27. 338
  28. 166
  29. 119
  30. 701
  31. 262
  32. 274
  33. 200
  34. 830
  35. 964
  36. 515
  37. 114
  38. 542
  39. 14
  40. 683

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