← 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 978 · 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. 1.439 − ? = 234
  2. 2.A train has 863 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  3. 3.693 − 179 =
  4. 4.652 − 171 =
  5. 5.157 + ? = 742
  6. 6.786 + 195 =
  7. 7.718 + 172 =
  8. 8.304 + 472 =
  9. 9.298 + ? = 501
  10. 10.664 + ? = 903
  11. 11.409 − 126 =
  12. 12.A train has 743 people in the front coaches and 153 people in the back coaches. How many people are on the train?
  13. 13.351 + 314 =
  14. 14.253 − 134 =
  15. 15.A train has 815 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  16. 16.A school has 388 children. 234 of them are girls. How many boys are there?
  17. 17.A school has 277 children. 142 of them are girls. How many boys are there?
  18. 18.875 − 467 =
  19. 19.? − 385 = 329
  20. 20.113 + 294 =
  21. 21.391 − 252 =
  22. 22.A school has 384 children. 304 of them are girls. How many boys are there?
  23. 23.255 + 509 =
  24. 24.? − 417 = 67
  25. 25.935 − ? = 266
  26. 26.442 − ? = 36
  27. 27.173 + 405 =
  28. 28.A train has 496 people in the front coaches and 214 people in the back coaches. How many people are on the train?
  29. 29.? − 385 = 237
  30. 30.A train has 187 people in the front coaches and 486 people in the back coaches. How many people are on the train?
  31. 31.A train has 305 people in the front coaches and 524 people in the back coaches. How many people are on the train?
  32. 32.? − 295 = 296
  33. 33.? + 860 = 981
  34. 34.? − 139 = 562
  35. 35.380 − 153 =
  36. 36.476 − 118 =
  37. 37.? − 328 = 147
  38. 38.802 − 684 =
  39. 39.? + 627 = 799
  40. 40.? + 280 = 683

Answer key

  1. 205
  2. 982
  3. 514
  4. 481
  5. 585
  6. 981
  7. 890
  8. 776
  9. 203
  10. 239
  11. 283
  12. 896
  13. 665
  14. 119
  15. 941
  16. 154
  17. 135
  18. 408
  19. 714
  20. 407
  21. 139
  22. 80
  23. 764
  24. 484
  25. 669
  26. 406
  27. 578
  28. 710
  29. 622
  30. 673
  31. 829
  32. 591
  33. 121
  34. 701
  35. 227
  36. 358
  37. 475
  38. 118
  39. 172
  40. 403

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