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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 952 · 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. 1.290 − 126 =
  2. 2.A train has 741 people in the front coaches and 234 people in the back coaches. How many people are on the train?
  3. 3.A train has 137 people in the front coaches and 794 people in the back coaches. How many people are on the train?
  4. 4.A school has 319 children. 195 of them are girls. How many boys are there?
  5. 5.401 + 561 =
  6. 6.893 − 159 =
  7. 7.427 − ? = 9
  8. 8.648 − 382 =
  9. 9.A school has 796 children. 560 of them are girls. How many boys are there?
  10. 10.A train has 172 people in the front coaches and 224 people in the back coaches. How many people are on the train?
  11. 11.420 − 123 =
  12. 12.653 − 134 =
  13. 13.A school has 839 children. 834 of them are girls. How many boys are there?
  14. 14.754 + 114 =
  15. 15.A train has 480 people in the front coaches and 483 people in the back coaches. How many people are on the train?
  16. 16.204 − 189 =
  17. 17.354 − ? = 61
  18. 18.? − 895 = 79
  19. 19.A school has 964 children. 587 of them are girls. How many boys are there?
  20. 20.? − 216 = 125
  21. 21.282 + 580 =
  22. 22.834 + 164 =
  23. 23.A train has 406 people in the front coaches and 163 people in the back coaches. How many people are on the train?
  24. 24.A school has 429 children. 427 of them are girls. How many boys are there?
  25. 25.? − 309 = 38
  26. 26.A train has 655 people in the front coaches and 227 people in the back coaches. How many people are on the train?
  27. 27.265 + 481 =
  28. 28.A train has 763 people in the front coaches and 191 people in the back coaches. How many people are on the train?
  29. 29.? + 533 = 818
  30. 30.882 + ? = 990
  31. 31.A school has 836 children. 769 of them are girls. How many boys are there?
  32. 32.A train has 625 people in the front coaches and 210 people in the back coaches. How many people are on the train?
  33. 33.A train has 113 people in the front coaches and 652 people in the back coaches. How many people are on the train?
  34. 34.232 − ? = 101
  35. 35.740 − ? = 285
  36. 36.A school has 605 children. 107 of them are girls. How many boys are there?
  37. 37.A school has 292 children. 252 of them are girls. How many boys are there?
  38. 38.733 − 427 =
  39. 39.635 − 549 =
  40. 40.A train has 101 people in the front coaches and 484 people in the back coaches. How many people are on the train?

Answer key

  1. 164
  2. 975
  3. 931
  4. 124
  5. 962
  6. 734
  7. 418
  8. 266
  9. 236
  10. 396
  11. 297
  12. 519
  13. 5
  14. 868
  15. 963
  16. 15
  17. 293
  18. 974
  19. 377
  20. 341
  21. 862
  22. 998
  23. 569
  24. 2
  25. 347
  26. 882
  27. 746
  28. 954
  29. 285
  30. 108
  31. 67
  32. 835
  33. 765
  34. 131
  35. 455
  36. 498
  37. 40
  38. 306
  39. 86
  40. 585

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