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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 206 · 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. 1.415 − 106 =
  2. 2.A train has 208 people in the front coaches and 611 people in the back coaches. How many people are on the train?
  3. 3.? − 220 = 234
  4. 4.A train has 286 people in the front coaches and 470 people in the back coaches. How many people are on the train?
  5. 5.197 + 755 =
  6. 6.A school has 790 children. 589 of them are girls. How many boys are there?
  7. 7.A school has 866 children. 693 of them are girls. How many boys are there?
  8. 8.? + 188 = 612
  9. 9.728 − ? = 332
  10. 10.A school has 362 children. 331 of them are girls. How many boys are there?
  11. 11.? + 767 = 897
  12. 12.983 − 399 =
  13. 13.A train has 164 people in the front coaches and 296 people in the back coaches. How many people are on the train?
  14. 14.A train has 116 people in the front coaches and 578 people in the back coaches. How many people are on the train?
  15. 15.A school has 986 children. 251 of them are girls. How many boys are there?
  16. 16.A school has 535 children. 509 of them are girls. How many boys are there?
  17. 17.A school has 862 children. 311 of them are girls. How many boys are there?
  18. 18.748 − ? = 378
  19. 19.342 + 426 =
  20. 20.397 − 302 =
  21. 21.768 + ? = 997
  22. 22.285 − ? = 122
  23. 23.? − 172 = 239
  24. 24.721 − ? = 184
  25. 25.A school has 298 children. 228 of them are girls. How many boys are there?
  26. 26.? − 127 = 272
  27. 27.884 + 111 =
  28. 28.237 − 206 =
  29. 29.A train has 766 people in the front coaches and 185 people in the back coaches. How many people are on the train?
  30. 30.976 − 678 =
  31. 31.498 − 440 =
  32. 32.614 + 255 =
  33. 33.424 + 158 =
  34. 34.A school has 891 children. 539 of them are girls. How many boys are there?
  35. 35.? + 695 = 814
  36. 36.? + 357 = 900
  37. 37.? + 501 = 967
  38. 38.A train has 891 people in the front coaches and 108 people in the back coaches. How many people are on the train?
  39. 39.404 + 374 =
  40. 40.A school has 773 children. 108 of them are girls. How many boys are there?

Answer key

  1. 309
  2. 819
  3. 454
  4. 756
  5. 952
  6. 201
  7. 173
  8. 424
  9. 396
  10. 31
  11. 130
  12. 584
  13. 460
  14. 694
  15. 735
  16. 26
  17. 551
  18. 370
  19. 768
  20. 95
  21. 229
  22. 163
  23. 411
  24. 537
  25. 70
  26. 399
  27. 995
  28. 31
  29. 951
  30. 298
  31. 58
  32. 869
  33. 582
  34. 352
  35. 119
  36. 543
  37. 466
  38. 999
  39. 778
  40. 665

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