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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 88 · 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. 1.670 − 259 =
  2. 2.470 − 198 =
  3. 3.544 − 313 =
  4. 4.512 − 198 =
  5. 5.A train has 307 people in the front coaches and 201 people in the back coaches. How many people are on the train?
  6. 6.282 + ? = 515
  7. 7.? − 205 = 455
  8. 8.? − 173 = 41
  9. 9.? + 555 = 793
  10. 10.A train has 782 people in the front coaches and 206 people in the back coaches. How many people are on the train?
  11. 11.A train has 846 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  12. 12.? − 513 = 35
  13. 13.A school has 370 children. 360 of them are girls. How many boys are there?
  14. 14.298 + 676 =
  15. 15.301 + 352 =
  16. 16.849 − 230 =
  17. 17.A train has 524 people in the front coaches and 233 people in the back coaches. How many people are on the train?
  18. 18.A train has 147 people in the front coaches and 129 people in the back coaches. How many people are on the train?
  19. 19.408 + 361 =
  20. 20.? − 290 = 181
  21. 21.A school has 402 children. 197 of them are girls. How many boys are there?
  22. 22.498 − 445 =
  23. 23.? + 109 = 532
  24. 24.256 − ? = 151
  25. 25.A school has 878 children. 474 of them are girls. How many boys are there?
  26. 26.? + 871 = 976
  27. 27.A school has 221 children. 176 of them are girls. How many boys are there?
  28. 28.834 − 719 =
  29. 29.500 + 210 =
  30. 30.A school has 725 children. 117 of them are girls. How many boys are there?
  31. 31.A train has 179 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  32. 32.331 + 391 =
  33. 33.379 + 465 =
  34. 34.? − 123 = 92
  35. 35.553 − 548 =
  36. 36.215 + 417 =
  37. 37.A school has 782 children. 650 of them are girls. How many boys are there?
  38. 38.499 − 342 =
  39. 39.835 − 445 =
  40. 40.A train has 881 people in the front coaches and 101 people in the back coaches. How many people are on the train?

Answer key

  1. 411
  2. 272
  3. 231
  4. 314
  5. 508
  6. 233
  7. 660
  8. 214
  9. 238
  10. 988
  11. 993
  12. 548
  13. 10
  14. 974
  15. 653
  16. 619
  17. 757
  18. 276
  19. 769
  20. 471
  21. 205
  22. 53
  23. 423
  24. 105
  25. 404
  26. 105
  27. 45
  28. 115
  29. 710
  30. 608
  31. 330
  32. 722
  33. 844
  34. 215
  35. 5
  36. 632
  37. 132
  38. 157
  39. 390
  40. 982

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