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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 838 · 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. 1.489 + 485 =
  2. 2.728 − 596 =
  3. 3.A school has 725 children. 238 of them are girls. How many boys are there?
  4. 4.815 − 591 =
  5. 5.111 + 284 =
  6. 6.A school has 228 children. 183 of them are girls. How many boys are there?
  7. 7.? − 407 = 7
  8. 8.426 − 246 =
  9. 9.180 + ? = 787
  10. 10.506 + 443 =
  11. 11.? − 715 = 239
  12. 12.222 + 627 =
  13. 13.? + 618 = 976
  14. 14.439 − ? = 260
  15. 15.A train has 303 people in the front coaches and 243 people in the back coaches. How many people are on the train?
  16. 16.760 − ? = 531
  17. 17.464 + 100 =
  18. 18.327 + 400 =
  19. 19.A school has 375 children. 216 of them are girls. How many boys are there?
  20. 20.429 + 561 =
  21. 21.385 + 559 =
  22. 22.? − 398 = 190
  23. 23.305 − 278 =
  24. 24.367 − 249 =
  25. 25.? − 510 = 7
  26. 26.? − 240 = 535
  27. 27.685 − ? = 435
  28. 28.834 − ? = 143
  29. 29.A train has 719 people in the front coaches and 276 people in the back coaches. How many people are on the train?
  30. 30.427 − 374 =
  31. 31.273 + 118 =
  32. 32.A school has 671 children. 274 of them are girls. How many boys are there?
  33. 33.A train has 490 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  34. 34.868 + 129 =
  35. 35.A train has 396 people in the front coaches and 194 people in the back coaches. How many people are on the train?
  36. 36.A school has 281 children. 167 of them are girls. How many boys are there?
  37. 37.A train has 709 people in the front coaches and 187 people in the back coaches. How many people are on the train?
  38. 38.360 − 357 =
  39. 39.A school has 310 children. 202 of them are girls. How many boys are there?
  40. 40.541 − ? = 84

Answer key

  1. 974
  2. 132
  3. 487
  4. 224
  5. 395
  6. 45
  7. 414
  8. 180
  9. 607
  10. 949
  11. 954
  12. 849
  13. 358
  14. 179
  15. 546
  16. 229
  17. 564
  18. 727
  19. 159
  20. 990
  21. 944
  22. 588
  23. 27
  24. 118
  25. 517
  26. 775
  27. 250
  28. 691
  29. 995
  30. 53
  31. 391
  32. 397
  33. 767
  34. 997
  35. 590
  36. 114
  37. 896
  38. 3
  39. 108
  40. 457

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