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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 418 · 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. 1.374 + 578 =
  2. 2.371 − 251 =
  3. 3.432 − 234 =
  4. 4.A school has 908 children. 257 of them are girls. How many boys are there?
  5. 5.655 + 203 =
  6. 6.? + 772 = 895
  7. 7.A school has 818 children. 366 of them are girls. How many boys are there?
  8. 8.446 − 138 =
  9. 9.608 + 173 =
  10. 10.966 − ? = 107
  11. 11.A train has 233 people in the front coaches and 247 people in the back coaches. How many people are on the train?
  12. 12.794 + 171 =
  13. 13.A train has 764 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  14. 14.A school has 349 children. 311 of them are girls. How many boys are there?
  15. 15.858 + 131 =
  16. 16.860 + 104 =
  17. 17.A train has 182 people in the front coaches and 652 people in the back coaches. How many people are on the train?
  18. 18.409 − ? = 90
  19. 19.241 + 320 =
  20. 20.679 + 289 =
  21. 21.522 + 267 =
  22. 22.A school has 376 children. 146 of them are girls. How many boys are there?
  23. 23.446 − 165 =
  24. 24.A train has 561 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  25. 25.A train has 700 people in the front coaches and 216 people in the back coaches. How many people are on the train?
  26. 26.? + 610 = 817
  27. 27.? − 127 = 752
  28. 28.A school has 696 children. 382 of them are girls. How many boys are there?
  29. 29.361 + 403 =
  30. 30.? − 531 = 447
  31. 31.815 − 556 =
  32. 32.A school has 673 children. 566 of them are girls. How many boys are there?
  33. 33.A train has 607 people in the front coaches and 167 people in the back coaches. How many people are on the train?
  34. 34.503 − 214 =
  35. 35.A train has 789 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  36. 36.442 − ? = 208
  37. 37.A school has 729 children. 124 of them are girls. How many boys are there?
  38. 38.374 − 289 =
  39. 39.754 + 131 =
  40. 40.522 − 355 =

Answer key

  1. 952
  2. 120
  3. 198
  4. 651
  5. 858
  6. 123
  7. 452
  8. 308
  9. 781
  10. 859
  11. 480
  12. 965
  13. 864
  14. 38
  15. 989
  16. 964
  17. 834
  18. 319
  19. 561
  20. 968
  21. 789
  22. 230
  23. 281
  24. 681
  25. 916
  26. 207
  27. 879
  28. 314
  29. 764
  30. 978
  31. 259
  32. 107
  33. 774
  34. 289
  35. 963
  36. 234
  37. 605
  38. 85
  39. 885
  40. 167

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