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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 636 · 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 751 children. 520 of them are girls. How many boys are there?
  2. 2.A school has 361 children. 271 of them are girls. How many boys are there?
  3. 3.792 + ? = 893
  4. 4.? + 754 = 972
  5. 5.232 + 488 =
  6. 6.214 − 146 =
  7. 7.A train has 782 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  8. 8.A train has 231 people in the front coaches and 317 people in the back coaches. How many people are on the train?
  9. 9.240 + 264 =
  10. 10.196 + 746 =
  11. 11.A school has 717 children. 309 of them are girls. How many boys are there?
  12. 12.A train has 491 people in the front coaches and 340 people in the back coaches. How many people are on the train?
  13. 13.A train has 304 people in the front coaches and 194 people in the back coaches. How many people are on the train?
  14. 14.A train has 695 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  15. 15.295 − 101 =
  16. 16.208 − 148 =
  17. 17.719 + ? = 843
  18. 18.A train has 794 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  19. 19.598 + 368 =
  20. 20.? + 477 = 594
  21. 21.779 − 365 =
  22. 22.A school has 472 children. 404 of them are girls. How many boys are there?
  23. 23.639 + 263 =
  24. 24.413 − 189 =
  25. 25.298 − 183 =
  26. 26.340 + ? = 968
  27. 27.A train has 570 people in the front coaches and 181 people in the back coaches. How many people are on the train?
  28. 28.A school has 417 children. 301 of them are girls. How many boys are there?
  29. 29.801 − 202 =
  30. 30.A school has 730 children. 168 of them are girls. How many boys are there?
  31. 31.? + 657 = 922
  32. 32.A school has 711 children. 331 of them are girls. How many boys are there?
  33. 33.211 + ? = 511
  34. 34.512 + 168 =
  35. 35.? − 333 = 655
  36. 36.733 + ? = 877
  37. 37.313 + 540 =
  38. 38.A train has 552 people in the front coaches and 420 people in the back coaches. How many people are on the train?
  39. 39.A school has 443 children. 157 of them are girls. How many boys are there?
  40. 40.368 − ? = 206

Answer key

  1. 231
  2. 90
  3. 101
  4. 218
  5. 720
  6. 68
  7. 956
  8. 548
  9. 504
  10. 942
  11. 408
  12. 831
  13. 498
  14. 818
  15. 194
  16. 60
  17. 124
  18. 943
  19. 966
  20. 117
  21. 414
  22. 68
  23. 902
  24. 224
  25. 115
  26. 628
  27. 751
  28. 116
  29. 599
  30. 562
  31. 265
  32. 380
  33. 300
  34. 680
  35. 988
  36. 144
  37. 853
  38. 972
  39. 286
  40. 162

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