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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 653 · 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. 1.263 + 437 =
  2. 2.A school has 241 children. 221 of them are girls. How many boys are there?
  3. 3.226 − ? = 109
  4. 4.524 − 109 =
  5. 5.907 − 637 =
  6. 6.? − 238 = 28
  7. 7.575 − ? = 166
  8. 8.583 + 230 =
  9. 9.? − 309 = 561
  10. 10.? + 653 = 926
  11. 11.A school has 226 children. 152 of them are girls. How many boys are there?
  12. 12.734 + 194 =
  13. 13.169 + 705 =
  14. 14.? + 418 = 834
  15. 15.A train has 255 people in the front coaches and 242 people in the back coaches. How many people are on the train?
  16. 16.540 + 293 =
  17. 17.633 + 168 =
  18. 18.? − 308 = 78
  19. 19.A school has 227 children. 135 of them are girls. How many boys are there?
  20. 20.A school has 324 children. 306 of them are girls. How many boys are there?
  21. 21.A school has 365 children. 321 of them are girls. How many boys are there?
  22. 22.A school has 822 children. 410 of them are girls. How many boys are there?
  23. 23.A school has 498 children. 228 of them are girls. How many boys are there?
  24. 24.663 − ? = 457
  25. 25.? − 110 = 237
  26. 26.580 − 579 =
  27. 27.A train has 330 people in the front coaches and 555 people in the back coaches. How many people are on the train?
  28. 28.995 − 937 =
  29. 29.? − 253 = 284
  30. 30.A school has 301 children. 258 of them are girls. How many boys are there?
  31. 31.A train has 746 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  32. 32.125 + 185 =
  33. 33.A train has 636 people in the front coaches and 335 people in the back coaches. How many people are on the train?
  34. 34.A train has 387 people in the front coaches and 202 people in the back coaches. How many people are on the train?
  35. 35.A school has 899 children. 249 of them are girls. How many boys are there?
  36. 36.684 − 251 =
  37. 37.A train has 805 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  38. 38.635 + 198 =
  39. 39.210 + 580 =
  40. 40.777 − 241 =

Answer key

  1. 700
  2. 20
  3. 117
  4. 415
  5. 270
  6. 266
  7. 409
  8. 813
  9. 870
  10. 273
  11. 74
  12. 928
  13. 874
  14. 416
  15. 497
  16. 833
  17. 801
  18. 386
  19. 92
  20. 18
  21. 44
  22. 412
  23. 270
  24. 206
  25. 347
  26. 1
  27. 885
  28. 58
  29. 537
  30. 43
  31. 904
  32. 310
  33. 971
  34. 589
  35. 650
  36. 433
  37. 920
  38. 833
  39. 790
  40. 536

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