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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 705 · 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 school has 863 children. 533 of them are girls. How many boys are there?
  2. 2.A school has 810 children. 718 of them are girls. How many boys are there?
  3. 3.A train has 806 people in the front coaches and 151 people in the back coaches. How many people are on the train?
  4. 4.A school has 378 children. 225 of them are girls. How many boys are there?
  5. 5.A train has 633 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  6. 6.674 + 140 =
  7. 7.150 + 691 =
  8. 8.882 + 104 =
  9. 9.A train has 828 people in the front coaches and 160 people in the back coaches. How many people are on the train?
  10. 10.106 + 395 =
  11. 11.449 + 414 =
  12. 12.? + 269 = 535
  13. 13.491 + ? = 977
  14. 14.A train has 545 people in the front coaches and 160 people in the back coaches. How many people are on the train?
  15. 15.? + 786 = 970
  16. 16.566 + 116 =
  17. 17.A school has 775 children. 651 of them are girls. How many boys are there?
  18. 18.A school has 607 children. 176 of them are girls. How many boys are there?
  19. 19.A train has 459 people in the front coaches and 186 people in the back coaches. How many people are on the train?
  20. 20.558 + ? = 968
  21. 21.641 − 130 =
  22. 22.? − 746 = 192
  23. 23.A train has 188 people in the front coaches and 348 people in the back coaches. How many people are on the train?
  24. 24.? − 124 = 111
  25. 25.291 − ? = 19
  26. 26.A train has 204 people in the front coaches and 211 people in the back coaches. How many people are on the train?
  27. 27.A school has 809 children. 466 of them are girls. How many boys are there?
  28. 28.400 − ? = 291
  29. 29.A school has 252 children. 133 of them are girls. How many boys are there?
  30. 30.A school has 683 children. 506 of them are girls. How many boys are there?
  31. 31.154 + 119 =
  32. 32.684 − ? = 178
  33. 33.938 − 885 =
  34. 34.? + 326 = 472
  35. 35.881 + 111 =
  36. 36.188 + 294 =
  37. 37.357 + 585 =
  38. 38.A school has 239 children. 103 of them are girls. How many boys are there?
  39. 39.681 + 313 =
  40. 40.804 + 165 =

Answer key

  1. 330
  2. 92
  3. 957
  4. 153
  5. 737
  6. 814
  7. 841
  8. 986
  9. 988
  10. 501
  11. 863
  12. 266
  13. 486
  14. 705
  15. 184
  16. 682
  17. 124
  18. 431
  19. 645
  20. 410
  21. 511
  22. 938
  23. 536
  24. 235
  25. 272
  26. 415
  27. 343
  28. 109
  29. 119
  30. 177
  31. 273
  32. 506
  33. 53
  34. 146
  35. 992
  36. 482
  37. 942
  38. 136
  39. 994
  40. 969

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