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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 740 · 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 779 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  2. 2.A train has 263 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  3. 3.A school has 346 children. 215 of them are girls. How many boys are there?
  4. 4.? − 604 = 203
  5. 5.429 + 352 =
  6. 6.A train has 332 people in the front coaches and 279 people in the back coaches. How many people are on the train?
  7. 7.403 + 468 =
  8. 8.A train has 651 people in the front coaches and 280 people in the back coaches. How many people are on the train?
  9. 9.176 + 619 =
  10. 10.140 + 183 =
  11. 11.A school has 344 children. 141 of them are girls. How many boys are there?
  12. 12.? − 143 = 96
  13. 13.A train has 286 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  14. 14.363 + 443 =
  15. 15.806 + 136 =
  16. 16.803 − ? = 572
  17. 17.? − 175 = 703
  18. 18.853 − 455 =
  19. 19.380 + 227 =
  20. 20.835 + ? = 939
  21. 21.? − 247 = 299
  22. 22.491 − 340 =
  23. 23.358 − 275 =
  24. 24.314 + 583 =
  25. 25.754 + 204 =
  26. 26.A train has 304 people in the front coaches and 362 people in the back coaches. How many people are on the train?
  27. 27.? + 704 = 978
  28. 28.A school has 746 children. 526 of them are girls. How many boys are there?
  29. 29.125 + 589 =
  30. 30.489 − 292 =
  31. 31.793 − ? = 227
  32. 32.189 + 567 =
  33. 33.A train has 571 people in the front coaches and 347 people in the back coaches. How many people are on the train?
  34. 34.521 + ? = 791
  35. 35.A school has 759 children. 443 of them are girls. How many boys are there?
  36. 36.451 + 222 =
  37. 37.140 + 111 =
  38. 38.A train has 118 people in the front coaches and 402 people in the back coaches. How many people are on the train?
  39. 39.? − 179 = 791
  40. 40.A train has 196 people in the front coaches and 572 people in the back coaches. How many people are on the train?

Answer key

  1. 890
  2. 503
  3. 131
  4. 807
  5. 781
  6. 611
  7. 871
  8. 931
  9. 795
  10. 323
  11. 203
  12. 239
  13. 526
  14. 806
  15. 942
  16. 231
  17. 878
  18. 398
  19. 607
  20. 104
  21. 546
  22. 151
  23. 83
  24. 897
  25. 958
  26. 666
  27. 274
  28. 220
  29. 714
  30. 197
  31. 566
  32. 756
  33. 918
  34. 270
  35. 316
  36. 673
  37. 251
  38. 520
  39. 970
  40. 768

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