← 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 696 · 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. 1.423 + 534 =
  2. 2.A school has 281 children. 124 of them are girls. How many boys are there?
  3. 3.272 + 234 =
  4. 4.A train has 164 people in the front coaches and 283 people in the back coaches. How many people are on the train?
  5. 5.A train has 331 people in the front coaches and 150 people in the back coaches. How many people are on the train?
  6. 6.945 − 237 =
  7. 7.211 + 350 =
  8. 8.450 − ? = 152
  9. 9.? − 237 = 393
  10. 10.404 − 153 =
  11. 11.? − 819 = 79
  12. 12.A school has 737 children. 422 of them are girls. How many boys are there?
  13. 13.? + 285 = 741
  14. 14.795 − 156 =
  15. 15.622 − 353 =
  16. 16.A train has 410 people in the front coaches and 396 people in the back coaches. How many people are on the train?
  17. 17.207 − 119 =
  18. 18.A train has 216 people in the front coaches and 589 people in the back coaches. How many people are on the train?
  19. 19.738 − 246 =
  20. 20.412 − 346 =
  21. 21.619 − 161 =
  22. 22.320 − 258 =
  23. 23.223 + 260 =
  24. 24.A train has 293 people in the front coaches and 338 people in the back coaches. How many people are on the train?
  25. 25.A school has 503 children. 275 of them are girls. How many boys are there?
  26. 26.820 − ? = 582
  27. 27.229 + 282 =
  28. 28.245 − 221 =
  29. 29.536 − ? = 17
  30. 30.A train has 130 people in the front coaches and 251 people in the back coaches. How many people are on the train?
  31. 31.A train has 728 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  32. 32.270 − 239 =
  33. 33.873 − 527 =
  34. 34.A train has 286 people in the front coaches and 476 people in the back coaches. How many people are on the train?
  35. 35.818 − 339 =
  36. 36.A train has 305 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  37. 37.? + 893 = 996
  38. 38.206 + ? = 645
  39. 39.145 + 183 =
  40. 40.210 − ? = 89

Answer key

  1. 957
  2. 157
  3. 506
  4. 447
  5. 481
  6. 708
  7. 561
  8. 298
  9. 630
  10. 251
  11. 898
  12. 315
  13. 456
  14. 639
  15. 269
  16. 806
  17. 88
  18. 805
  19. 492
  20. 66
  21. 458
  22. 62
  23. 483
  24. 631
  25. 228
  26. 238
  27. 511
  28. 24
  29. 519
  30. 381
  31. 879
  32. 31
  33. 346
  34. 762
  35. 479
  36. 408
  37. 103
  38. 439
  39. 328
  40. 121

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