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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 812 · 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 train has 422 people in the front coaches and 373 people in the back coaches. How many people are on the train?
  2. 2.448 − 315 =
  3. 3.959 − ? = 698
  4. 4.595 + ? = 930
  5. 5.A train has 182 people in the front coaches and 232 people in the back coaches. How many people are on the train?
  6. 6.304 + 635 =
  7. 7.A school has 571 children. 497 of them are girls. How many boys are there?
  8. 8.A train has 737 people in the front coaches and 131 people in the back coaches. How many people are on the train?
  9. 9.154 + 125 =
  10. 10.A school has 217 children. 105 of them are girls. How many boys are there?
  11. 11.268 + 219 =
  12. 12.A school has 766 children. 676 of them are girls. How many boys are there?
  13. 13.969 − 575 =
  14. 14.? − 204 = 192
  15. 15.881 − 420 =
  16. 16.885 − 776 =
  17. 17.987 − 148 =
  18. 18.? + 715 = 974
  19. 19.A school has 799 children. 273 of them are girls. How many boys are there?
  20. 20.355 − 159 =
  21. 21.A school has 811 children. 743 of them are girls. How many boys are there?
  22. 22.741 + ? = 996
  23. 23.A school has 645 children. 566 of them are girls. How many boys are there?
  24. 24.185 + 734 =
  25. 25.593 − 255 =
  26. 26.A school has 917 children. 556 of them are girls. How many boys are there?
  27. 27.A train has 307 people in the front coaches and 472 people in the back coaches. How many people are on the train?
  28. 28.300 − 281 =
  29. 29.372 + 236 =
  30. 30.A train has 456 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  31. 31.213 − ? = 59
  32. 32.? + 541 = 918
  33. 33.A school has 559 children. 406 of them are girls. How many boys are there?
  34. 34.233 − 155 =
  35. 35.A train has 154 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  36. 36.444 − 296 =
  37. 37.586 − 448 =
  38. 38.132 + ? = 910
  39. 39.630 − 355 =
  40. 40.744 + 131 =

Answer key

  1. 795
  2. 133
  3. 261
  4. 335
  5. 414
  6. 939
  7. 74
  8. 868
  9. 279
  10. 112
  11. 487
  12. 90
  13. 394
  14. 396
  15. 461
  16. 109
  17. 839
  18. 259
  19. 526
  20. 196
  21. 68
  22. 255
  23. 79
  24. 919
  25. 338
  26. 361
  27. 779
  28. 19
  29. 608
  30. 658
  31. 154
  32. 377
  33. 153
  34. 78
  35. 273
  36. 148
  37. 138
  38. 778
  39. 275
  40. 875

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