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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 711 · 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. 1.151 + 407 =
  2. 2.A school has 504 children. 488 of them are girls. How many boys are there?
  3. 3.831 + ? = 934
  4. 4.? − 197 = 492
  5. 5.A train has 819 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  6. 6.431 + 345 =
  7. 7.? − 159 = 402
  8. 8.966 − 501 =
  9. 9.A train has 805 people in the front coaches and 106 people in the back coaches. How many people are on the train?
  10. 10.A train has 773 people in the front coaches and 225 people in the back coaches. How many people are on the train?
  11. 11.A train has 349 people in the front coaches and 348 people in the back coaches. How many people are on the train?
  12. 12.A school has 589 children. 239 of them are girls. How many boys are there?
  13. 13.A train has 241 people in the front coaches and 668 people in the back coaches. How many people are on the train?
  14. 14.634 + 276 =
  15. 15.? + 617 = 772
  16. 16.349 + ? = 832
  17. 17.950 − 504 =
  18. 18.A school has 784 children. 126 of them are girls. How many boys are there?
  19. 19.A school has 324 children. 312 of them are girls. How many boys are there?
  20. 20.404 − ? = 34
  21. 21.A school has 642 children. 110 of them are girls. How many boys are there?
  22. 22.734 − ? = 196
  23. 23.858 − 660 =
  24. 24.446 − 226 =
  25. 25.? − 816 = 16
  26. 26.A school has 471 children. 274 of them are girls. How many boys are there?
  27. 27.? − 757 = 181
  28. 28.? + 345 = 465
  29. 29.? − 106 = 139
  30. 30.788 + 101 =
  31. 31.A school has 301 children. 130 of them are girls. How many boys are there?
  32. 32.662 − 628 =
  33. 33.A school has 757 children. 264 of them are girls. How many boys are there?
  34. 34.977 − ? = 273
  35. 35.? + 312 = 722
  36. 36.459 + ? = 772
  37. 37.A train has 835 people in the front coaches and 153 people in the back coaches. How many people are on the train?
  38. 38.A train has 841 people in the front coaches and 137 people in the back coaches. How many people are on the train?
  39. 39.A school has 852 children. 338 of them are girls. How many boys are there?
  40. 40.712 − 542 =

Answer key

  1. 558
  2. 16
  3. 103
  4. 689
  5. 924
  6. 776
  7. 561
  8. 465
  9. 911
  10. 998
  11. 697
  12. 350
  13. 909
  14. 910
  15. 155
  16. 483
  17. 446
  18. 658
  19. 12
  20. 370
  21. 532
  22. 538
  23. 198
  24. 220
  25. 832
  26. 197
  27. 938
  28. 120
  29. 245
  30. 889
  31. 171
  32. 34
  33. 493
  34. 704
  35. 410
  36. 313
  37. 988
  38. 978
  39. 514
  40. 170

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