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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 946 · 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. 1.310 − 298 =
  2. 2.454 − 297 =
  3. 3.795 + ? = 963
  4. 4.292 − ? = 143
  5. 5.402 + 185 =
  6. 6.A school has 509 children. 194 of them are girls. How many boys are there?
  7. 7.849 + 133 =
  8. 8.333 + ? = 565
  9. 9.? + 258 = 514
  10. 10.A school has 495 children. 341 of them are girls. How many boys are there?
  11. 11.A train has 676 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  12. 12.A school has 813 children. 193 of them are girls. How many boys are there?
  13. 13.? + 227 = 524
  14. 14.639 + 258 =
  15. 15.441 + 242 =
  16. 16.A train has 443 people in the front coaches and 276 people in the back coaches. How many people are on the train?
  17. 17.A train has 174 people in the front coaches and 562 people in the back coaches. How many people are on the train?
  18. 18.A train has 572 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  19. 19.451 + 298 =
  20. 20.619 − ? = 457
  21. 21.? − 175 = 610
  22. 22.498 + 249 =
  23. 23.294 + 368 =
  24. 24.101 + 265 =
  25. 25.761 − ? = 489
  26. 26.A school has 383 children. 186 of them are girls. How many boys are there?
  27. 27.A school has 402 children. 236 of them are girls. How many boys are there?
  28. 28.820 − 284 =
  29. 29.A train has 105 people in the front coaches and 164 people in the back coaches. How many people are on the train?
  30. 30.298 − 269 =
  31. 31.711 + 162 =
  32. 32.610 + 111 =
  33. 33.340 + 336 =
  34. 34.454 − 179 =
  35. 35.220 − 210 =
  36. 36.780 − 750 =
  37. 37.? + 687 = 955
  38. 38.584 − 152 =
  39. 39.486 − 123 =
  40. 40.A train has 330 people in the front coaches and 298 people in the back coaches. How many people are on the train?

Answer key

  1. 12
  2. 157
  3. 168
  4. 149
  5. 587
  6. 315
  7. 982
  8. 232
  9. 256
  10. 154
  11. 834
  12. 620
  13. 297
  14. 897
  15. 683
  16. 719
  17. 736
  18. 754
  19. 749
  20. 162
  21. 785
  22. 747
  23. 662
  24. 366
  25. 272
  26. 197
  27. 166
  28. 536
  29. 269
  30. 29
  31. 873
  32. 721
  33. 676
  34. 275
  35. 10
  36. 30
  37. 268
  38. 432
  39. 363
  40. 628

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