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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 136 · 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.A train has 695 people in the front coaches and 209 people in the back coaches. How many people are on the train?
  2. 2.662 + ? = 970
  3. 3.313 + ? = 801
  4. 4.723 + 116 =
  5. 5.A train has 364 people in the front coaches and 628 people in the back coaches. How many people are on the train?
  6. 6.A school has 373 children. 351 of them are girls. How many boys are there?
  7. 7.976 − 558 =
  8. 8.479 + ? = 690
  9. 9.A train has 852 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  10. 10.A school has 999 children. 203 of them are girls. How many boys are there?
  11. 11.A train has 342 people in the front coaches and 135 people in the back coaches. How many people are on the train?
  12. 12.A train has 120 people in the front coaches and 230 people in the back coaches. How many people are on the train?
  13. 13.619 − ? = 214
  14. 14.A school has 794 children. 637 of them are girls. How many boys are there?
  15. 15.269 − 140 =
  16. 16.441 + ? = 771
  17. 17.898 + 101 =
  18. 18.? − 347 = 60
  19. 19.A train has 120 people in the front coaches and 274 people in the back coaches. How many people are on the train?
  20. 20.585 − 181 =
  21. 21.897 − 459 =
  22. 22.A school has 772 children. 144 of them are girls. How many boys are there?
  23. 23.? − 144 = 842
  24. 24.A train has 475 people in the front coaches and 366 people in the back coaches. How many people are on the train?
  25. 25.798 − 586 =
  26. 26.337 + 622 =
  27. 27.734 − ? = 504
  28. 28.294 + 411 =
  29. 29.855 + ? = 955
  30. 30.226 − 155 =
  31. 31.A train has 408 people in the front coaches and 417 people in the back coaches. How many people are on the train?
  32. 32.325 + 648 =
  33. 33.? − 299 = 138
  34. 34.246 − ? = 76
  35. 35.A school has 493 children. 286 of them are girls. How many boys are there?
  36. 36.744 + 153 =
  37. 37.? − 357 = 636
  38. 38.343 + ? = 608
  39. 39.A train has 463 people in the front coaches and 511 people in the back coaches. How many people are on the train?
  40. 40.? + 534 = 861

Answer key

  1. 904
  2. 308
  3. 488
  4. 839
  5. 992
  6. 22
  7. 418
  8. 211
  9. 954
  10. 796
  11. 477
  12. 350
  13. 405
  14. 157
  15. 129
  16. 330
  17. 999
  18. 407
  19. 394
  20. 404
  21. 438
  22. 628
  23. 986
  24. 841
  25. 212
  26. 959
  27. 230
  28. 705
  29. 100
  30. 71
  31. 825
  32. 973
  33. 437
  34. 170
  35. 207
  36. 897
  37. 993
  38. 265
  39. 974
  40. 327

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