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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 108 · 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.A school has 646 children. 218 of them are girls. How many boys are there?
  2. 2.690 − 669 =
  3. 3.655 − 193 =
  4. 4.A train has 402 people in the front coaches and 248 people in the back coaches. How many people are on the train?
  5. 5.A train has 584 people in the front coaches and 243 people in the back coaches. How many people are on the train?
  6. 6.A train has 531 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  7. 7.439 + 261 =
  8. 8.A train has 705 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  9. 9.713 − 519 =
  10. 10.A train has 364 people in the front coaches and 226 people in the back coaches. How many people are on the train?
  11. 11.? + 290 = 457
  12. 12.A train has 508 people in the front coaches and 285 people in the back coaches. How many people are on the train?
  13. 13.756 − 569 =
  14. 14.262 − 130 =
  15. 15.A school has 246 children. 239 of them are girls. How many boys are there?
  16. 16.636 − ? = 170
  17. 17.? − 254 = 48
  18. 18.326 − 123 =
  19. 19.213 + 487 =
  20. 20.920 − ? = 656
  21. 21.A school has 433 children. 190 of them are girls. How many boys are there?
  22. 22.? + 232 = 761
  23. 23.? − 221 = 9
  24. 24.A train has 230 people in the front coaches and 271 people in the back coaches. How many people are on the train?
  25. 25.A train has 121 people in the front coaches and 634 people in the back coaches. How many people are on the train?
  26. 26.A train has 397 people in the front coaches and 432 people in the back coaches. How many people are on the train?
  27. 27.? − 292 = 360
  28. 28.458 + ? = 562
  29. 29.? + 281 = 980
  30. 30.333 − 190 =
  31. 31.193 + ? = 943
  32. 32.619 − ? = 456
  33. 33.803 − 404 =
  34. 34.A school has 987 children. 336 of them are girls. How many boys are there?
  35. 35.890 − 438 =
  36. 36.A train has 247 people in the front coaches and 516 people in the back coaches. How many people are on the train?
  37. 37.430 − ? = 325
  38. 38.A train has 469 people in the front coaches and 393 people in the back coaches. How many people are on the train?
  39. 39.? − 633 = 296
  40. 40.? + 742 = 919

Answer key

  1. 428
  2. 21
  3. 462
  4. 650
  5. 827
  6. 635
  7. 700
  8. 811
  9. 194
  10. 590
  11. 167
  12. 793
  13. 187
  14. 132
  15. 7
  16. 466
  17. 302
  18. 203
  19. 700
  20. 264
  21. 243
  22. 529
  23. 230
  24. 501
  25. 755
  26. 829
  27. 652
  28. 104
  29. 699
  30. 143
  31. 750
  32. 163
  33. 399
  34. 651
  35. 452
  36. 763
  37. 105
  38. 862
  39. 929
  40. 177

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