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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 523 · 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. 1.807 − 430 =
  2. 2.636 − 568 =
  3. 3.391 + 254 =
  4. 4.? − 529 = 60
  5. 5.216 − 154 =
  6. 6.A school has 659 children. 591 of them are girls. How many boys are there?
  7. 7.? − 330 = 100
  8. 8.933 − 447 =
  9. 9.201 − 110 =
  10. 10.A train has 423 people in the front coaches and 427 people in the back coaches. How many people are on the train?
  11. 11.279 − 187 =
  12. 12.922 − 439 =
  13. 13.A school has 325 children. 265 of them are girls. How many boys are there?
  14. 14.A train has 784 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  15. 15.381 − ? = 151
  16. 16.298 − ? = 185
  17. 17.A school has 959 children. 790 of them are girls. How many boys are there?
  18. 18.A train has 611 people in the front coaches and 283 people in the back coaches. How many people are on the train?
  19. 19.328 + 325 =
  20. 20.894 − ? = 755
  21. 21.776 + 110 =
  22. 22.A train has 621 people in the front coaches and 121 people in the back coaches. How many people are on the train?
  23. 23.? − 114 = 723
  24. 24.? − 305 = 5
  25. 25.? − 576 = 80
  26. 26.325 − 240 =
  27. 27.181 + ? = 462
  28. 28.522 − ? = 275
  29. 29.288 + 408 =
  30. 30.A train has 242 people in the front coaches and 184 people in the back coaches. How many people are on the train?
  31. 31.? + 268 = 465
  32. 32.? + 861 = 998
  33. 33.A train has 540 people in the front coaches and 445 people in the back coaches. How many people are on the train?
  34. 34.779 + 129 =
  35. 35.615 − 480 =
  36. 36.? + 820 = 955
  37. 37.263 + 673 =
  38. 38.496 + 134 =
  39. 39.899 − 871 =
  40. 40.790 + 130 =

Answer key

  1. 377
  2. 68
  3. 645
  4. 589
  5. 62
  6. 68
  7. 430
  8. 486
  9. 91
  10. 850
  11. 92
  12. 483
  13. 60
  14. 888
  15. 230
  16. 113
  17. 169
  18. 894
  19. 653
  20. 139
  21. 886
  22. 742
  23. 837
  24. 310
  25. 656
  26. 85
  27. 281
  28. 247
  29. 696
  30. 426
  31. 197
  32. 137
  33. 985
  34. 908
  35. 135
  36. 135
  37. 936
  38. 630
  39. 28
  40. 920

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