← 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 235 · 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.? + 861 = 988
  2. 2.A school has 931 children. 156 of them are girls. How many boys are there?
  3. 3.A train has 257 people in the front coaches and 596 people in the back coaches. How many people are on the train?
  4. 4.211 + 184 =
  5. 5.137 + 279 =
  6. 6.A school has 385 children. 151 of them are girls. How many boys are there?
  7. 7.? + 443 = 654
  8. 8.A train has 261 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  9. 9.520 + ? = 923
  10. 10.772 − 581 =
  11. 11.A school has 842 children. 186 of them are girls. How many boys are there?
  12. 12.501 + 330 =
  13. 13.604 + 260 =
  14. 14.A school has 429 children. 212 of them are girls. How many boys are there?
  15. 15.512 − 394 =
  16. 16.? − 592 = 132
  17. 17.872 − 695 =
  18. 18.839 − 421 =
  19. 19.151 + 777 =
  20. 20.A school has 547 children. 241 of them are girls. How many boys are there?
  21. 21.614 − 146 =
  22. 22.439 + ? = 879
  23. 23.555 + 120 =
  24. 24.336 − ? = 22
  25. 25.A train has 212 people in the front coaches and 448 people in the back coaches. How many people are on the train?
  26. 26.142 + 189 =
  27. 27.435 + 203 =
  28. 28.841 − 544 =
  29. 29.452 − 374 =
  30. 30.596 − 280 =
  31. 31.773 − 170 =
  32. 32.709 − ? = 538
  33. 33.526 − 491 =
  34. 34.? + 329 = 646
  35. 35.564 + 320 =
  36. 36.313 + 461 =
  37. 37.A school has 215 children. 110 of them are girls. How many boys are there?
  38. 38.666 − ? = 136
  39. 39.A train has 804 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  40. 40.367 + 344 =

Answer key

  1. 127
  2. 775
  3. 853
  4. 395
  5. 416
  6. 234
  7. 211
  8. 376
  9. 403
  10. 191
  11. 656
  12. 831
  13. 864
  14. 217
  15. 118
  16. 724
  17. 177
  18. 418
  19. 928
  20. 306
  21. 468
  22. 440
  23. 675
  24. 314
  25. 660
  26. 331
  27. 638
  28. 297
  29. 78
  30. 316
  31. 603
  32. 171
  33. 35
  34. 317
  35. 884
  36. 774
  37. 105
  38. 530
  39. 978
  40. 711

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