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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 386 · 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. 1.350 − 262 =
  2. 2.199 + ? = 447
  3. 3.888 − 465 =
  4. 4.897 + 100 =
  5. 5.851 − 583 =
  6. 6.A train has 800 people in the front coaches and 161 people in the back coaches. How many people are on the train?
  7. 7.A train has 193 people in the front coaches and 584 people in the back coaches. How many people are on the train?
  8. 8.? + 871 = 979
  9. 9.? + 331 = 716
  10. 10.A school has 403 children. 216 of them are girls. How many boys are there?
  11. 11.A school has 513 children. 145 of them are girls. How many boys are there?
  12. 12.A train has 671 people in the front coaches and 230 people in the back coaches. How many people are on the train?
  13. 13.A school has 433 children. 240 of them are girls. How many boys are there?
  14. 14.998 − 961 =
  15. 15.406 − 264 =
  16. 16.125 + 798 =
  17. 17.A school has 565 children. 144 of them are girls. How many boys are there?
  18. 18.337 − 127 =
  19. 19.498 − 108 =
  20. 20.390 − 117 =
  21. 21.455 + 346 =
  22. 22.210 − 177 =
  23. 23.A school has 400 children. 378 of them are girls. How many boys are there?
  24. 24.409 − ? = 241
  25. 25.A train has 516 people in the front coaches and 285 people in the back coaches. How many people are on the train?
  26. 26.244 − 123 =
  27. 27.A school has 642 children. 537 of them are girls. How many boys are there?
  28. 28.A school has 456 children. 304 of them are girls. How many boys are there?
  29. 29.A school has 786 children. 616 of them are girls. How many boys are there?
  30. 30.622 + 176 =
  31. 31.A school has 593 children. 576 of them are girls. How many boys are there?
  32. 32.788 + 194 =
  33. 33.287 + 128 =
  34. 34.A school has 218 children. 121 of them are girls. How many boys are there?
  35. 35.434 − 219 =
  36. 36.A train has 496 people in the front coaches and 322 people in the back coaches. How many people are on the train?
  37. 37.846 − 283 =
  38. 38.A school has 522 children. 186 of them are girls. How many boys are there?
  39. 39.A school has 328 children. 158 of them are girls. How many boys are there?
  40. 40.688 + 120 =

Answer key

  1. 88
  2. 248
  3. 423
  4. 997
  5. 268
  6. 961
  7. 777
  8. 108
  9. 385
  10. 187
  11. 368
  12. 901
  13. 193
  14. 37
  15. 142
  16. 923
  17. 421
  18. 210
  19. 390
  20. 273
  21. 801
  22. 33
  23. 22
  24. 168
  25. 801
  26. 121
  27. 105
  28. 152
  29. 170
  30. 798
  31. 17
  32. 982
  33. 415
  34. 97
  35. 215
  36. 818
  37. 563
  38. 336
  39. 170
  40. 808

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