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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 950 · 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 447 children. 394 of them are girls. How many boys are there?
  2. 2.630 − 423 =
  3. 3.647 + 273 =
  4. 4.409 + 533 =
  5. 5.A train has 194 people in the front coaches and 410 people in the back coaches. How many people are on the train?
  6. 6.415 + 223 =
  7. 7.647 − 403 =
  8. 8.? − 483 = 343
  9. 9.A train has 752 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  10. 10.222 − 147 =
  11. 11.252 + 230 =
  12. 12.A school has 607 children. 403 of them are girls. How many boys are there?
  13. 13.? + 533 = 874
  14. 14.884 − ? = 59
  15. 15.804 + ? = 919
  16. 16.206 − ? = 63
  17. 17.A school has 408 children. 375 of them are girls. How many boys are there?
  18. 18.A train has 510 people in the front coaches and 408 people in the back coaches. How many people are on the train?
  19. 19.354 − ? = 10
  20. 20.419 + ? = 770
  21. 21.537 + 129 =
  22. 22.246 + ? = 430
  23. 23.A train has 836 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  24. 24.341 − 334 =
  25. 25.? + 301 = 418
  26. 26.A train has 209 people in the front coaches and 532 people in the back coaches. How many people are on the train?
  27. 27.A train has 725 people in the front coaches and 226 people in the back coaches. How many people are on the train?
  28. 28.A train has 847 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  29. 29.A train has 583 people in the front coaches and 168 people in the back coaches. How many people are on the train?
  30. 30.826 − 209 =
  31. 31.254 − 180 =
  32. 32.417 − 338 =
  33. 33.449 + 202 =
  34. 34.852 − ? = 712
  35. 35.A school has 603 children. 196 of them are girls. How many boys are there?
  36. 36.543 + 166 =
  37. 37.239 − 153 =
  38. 38.A train has 124 people in the front coaches and 798 people in the back coaches. How many people are on the train?
  39. 39.769 − ? = 580
  40. 40.317 − ? = 11

Answer key

  1. 53
  2. 207
  3. 920
  4. 942
  5. 604
  6. 638
  7. 244
  8. 826
  9. 863
  10. 75
  11. 482
  12. 204
  13. 341
  14. 825
  15. 115
  16. 143
  17. 33
  18. 918
  19. 344
  20. 351
  21. 666
  22. 184
  23. 937
  24. 7
  25. 117
  26. 741
  27. 951
  28. 955
  29. 751
  30. 617
  31. 74
  32. 79
  33. 651
  34. 140
  35. 407
  36. 709
  37. 86
  38. 922
  39. 189
  40. 306

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