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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 507 · 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. 1.614 + 384 =
  2. 2.A school has 573 children. 367 of them are girls. How many boys are there?
  3. 3.242 + ? = 722
  4. 4.A school has 836 children. 287 of them are girls. How many boys are there?
  5. 5.A school has 805 children. 803 of them are girls. How many boys are there?
  6. 6.763 − ? = 22
  7. 7.251 + 549 =
  8. 8.546 + 242 =
  9. 9.352 − 132 =
  10. 10.A train has 791 people in the front coaches and 132 people in the back coaches. How many people are on the train?
  11. 11.A school has 717 children. 124 of them are girls. How many boys are there?
  12. 12.845 + ? = 950
  13. 13.619 − 314 =
  14. 14.A train has 278 people in the front coaches and 448 people in the back coaches. How many people are on the train?
  15. 15.127 + 126 =
  16. 16.894 + ? = 999
  17. 17.780 + ? = 934
  18. 18.A school has 533 children. 405 of them are girls. How many boys are there?
  19. 19.A train has 863 people in the front coaches and 121 people in the back coaches. How many people are on the train?
  20. 20.A train has 378 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  21. 21.395 − 381 =
  22. 22.803 + 111 =
  23. 23.A train has 691 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  24. 24.464 + 145 =
  25. 25.A school has 406 children. 237 of them are girls. How many boys are there?
  26. 26.? + 444 = 760
  27. 27.A train has 135 people in the front coaches and 320 people in the back coaches. How many people are on the train?
  28. 28.777 + ? = 923
  29. 29.281 − 129 =
  30. 30.492 − 166 =
  31. 31.683 − 518 =
  32. 32.A train has 280 people in the front coaches and 582 people in the back coaches. How many people are on the train?
  33. 33.? + 716 = 941
  34. 34.165 + ? = 297
  35. 35.626 + ? = 897
  36. 36.353 − 189 =
  37. 37.210 − 133 =
  38. 38.593 + ? = 786
  39. 39.? + 559 = 932
  40. 40.? − 276 = 406

Answer key

  1. 998
  2. 206
  3. 480
  4. 549
  5. 2
  6. 741
  7. 800
  8. 788
  9. 220
  10. 923
  11. 593
  12. 105
  13. 305
  14. 726
  15. 253
  16. 105
  17. 154
  18. 128
  19. 984
  20. 511
  21. 14
  22. 914
  23. 847
  24. 609
  25. 169
  26. 316
  27. 455
  28. 146
  29. 152
  30. 326
  31. 165
  32. 862
  33. 225
  34. 132
  35. 271
  36. 164
  37. 77
  38. 193
  39. 373
  40. 682

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