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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 984 · 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. 1.637 − ? = 435
  2. 2.384 + ? = 486
  3. 3.? − 700 = 261
  4. 4.A train has 457 people in the front coaches and 238 people in the back coaches. How many people are on the train?
  5. 5.A train has 603 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  6. 6.A train has 362 people in the front coaches and 563 people in the back coaches. How many people are on the train?
  7. 7.A school has 735 children. 156 of them are girls. How many boys are there?
  8. 8.? − 133 = 201
  9. 9.A train has 716 people in the front coaches and 175 people in the back coaches. How many people are on the train?
  10. 10.A school has 379 children. 260 of them are girls. How many boys are there?
  11. 11.866 + 104 =
  12. 12.A school has 611 children. 275 of them are girls. How many boys are there?
  13. 13.215 − 165 =
  14. 14.471 + 354 =
  15. 15.? + 297 = 531
  16. 16.980 − ? = 749
  17. 17.A train has 583 people in the front coaches and 329 people in the back coaches. How many people are on the train?
  18. 18.A train has 438 people in the front coaches and 319 people in the back coaches. How many people are on the train?
  19. 19.782 + 167 =
  20. 20.A train has 110 people in the front coaches and 164 people in the back coaches. How many people are on the train?
  21. 21.A train has 224 people in the front coaches and 300 people in the back coaches. How many people are on the train?
  22. 22.? + 386 = 491
  23. 23.A train has 770 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  24. 24.870 + ? = 993
  25. 25.A train has 650 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  26. 26.A train has 660 people in the front coaches and 183 people in the back coaches. How many people are on the train?
  27. 27.A train has 190 people in the front coaches and 321 people in the back coaches. How many people are on the train?
  28. 28.A school has 706 children. 261 of them are girls. How many boys are there?
  29. 29.A train has 154 people in the front coaches and 643 people in the back coaches. How many people are on the train?
  30. 30.108 + 561 =
  31. 31.A train has 892 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  32. 32.657 − ? = 516
  33. 33.639 + 241 =
  34. 34.790 − ? = 3
  35. 35.493 + 418 =
  36. 36.185 + ? = 505
  37. 37.226 + ? = 617
  38. 38.931 − 352 =
  39. 39.160 + 804 =
  40. 40.509 + 321 =

Answer key

  1. 202
  2. 102
  3. 961
  4. 695
  5. 704
  6. 925
  7. 579
  8. 334
  9. 891
  10. 119
  11. 970
  12. 336
  13. 50
  14. 825
  15. 234
  16. 231
  17. 912
  18. 757
  19. 949
  20. 274
  21. 524
  22. 105
  23. 871
  24. 123
  25. 808
  26. 843
  27. 511
  28. 445
  29. 797
  30. 669
  31. 998
  32. 141
  33. 880
  34. 787
  35. 911
  36. 320
  37. 391
  38. 579
  39. 964
  40. 830

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