← 3-digit addition and subtraction lesson New set →

Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 982 · 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.? − 241 = 31
  2. 2.A school has 569 children. 446 of them are girls. How many boys are there?
  3. 3.A school has 933 children. 704 of them are girls. How many boys are there?
  4. 4.828 − ? = 36
  5. 5.817 − 482 =
  6. 6.A train has 598 people in the front coaches and 233 people in the back coaches. How many people are on the train?
  7. 7.585 + 187 =
  8. 8.689 + 104 =
  9. 9.? + 122 = 794
  10. 10.678 − 628 =
  11. 11.A school has 359 children. 111 of them are girls. How many boys are there?
  12. 12.? + 224 = 651
  13. 13.A school has 750 children. 405 of them are girls. How many boys are there?
  14. 14.? − 255 = 112
  15. 15.A train has 634 people in the front coaches and 193 people in the back coaches. How many people are on the train?
  16. 16.A school has 986 children. 343 of them are girls. How many boys are there?
  17. 17.503 − 450 =
  18. 18.829 + 151 =
  19. 19.978 − ? = 594
  20. 20.376 + 478 =
  21. 21.A train has 750 people in the front coaches and 141 people in the back coaches. How many people are on the train?
  22. 22.515 + ? = 967
  23. 23.? + 435 = 565
  24. 24.? + 262 = 603
  25. 25.461 − ? = 178
  26. 26.? + 279 = 754
  27. 27.A train has 324 people in the front coaches and 280 people in the back coaches. How many people are on the train?
  28. 28.690 − ? = 367
  29. 29.? − 664 = 71
  30. 30.? − 530 = 128
  31. 31.A school has 786 children. 613 of them are girls. How many boys are there?
  32. 32.? + 204 = 720
  33. 33.207 + 244 =
  34. 34.574 − 187 =
  35. 35.? + 634 = 782
  36. 36.293 − ? = 191
  37. 37.324 + ? = 619
  38. 38.A train has 261 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  39. 39.298 + 563 =
  40. 40.? + 433 = 977

Answer key

  1. 272
  2. 123
  3. 229
  4. 792
  5. 335
  6. 831
  7. 772
  8. 793
  9. 672
  10. 50
  11. 248
  12. 427
  13. 345
  14. 367
  15. 827
  16. 643
  17. 53
  18. 980
  19. 384
  20. 854
  21. 891
  22. 452
  23. 130
  24. 341
  25. 283
  26. 475
  27. 604
  28. 323
  29. 735
  30. 658
  31. 173
  32. 516
  33. 451
  34. 387
  35. 148
  36. 102
  37. 295
  38. 423
  39. 861
  40. 544

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets