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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 219 · 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.? − 163 = 64
  2. 2.908 − 409 =
  3. 3.579 − 132 =
  4. 4.231 + 195 =
  5. 5.234 − 119 =
  6. 6.A school has 660 children. 198 of them are girls. How many boys are there?
  7. 7.822 + ? = 986
  8. 8.A train has 616 people in the front coaches and 150 people in the back coaches. How many people are on the train?
  9. 9.486 − 444 =
  10. 10.773 + 217 =
  11. 11.? + 220 = 629
  12. 12.A school has 322 children. 200 of them are girls. How many boys are there?
  13. 13.503 − 325 =
  14. 14.123 + 128 =
  15. 15.292 − 251 =
  16. 16.531 − ? = 201
  17. 17.? + 678 = 808
  18. 18.540 − 383 =
  19. 19.122 + 191 =
  20. 20.A train has 739 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  21. 21.A train has 390 people in the front coaches and 582 people in the back coaches. How many people are on the train?
  22. 22.822 + 120 =
  23. 23.A train has 118 people in the front coaches and 397 people in the back coaches. How many people are on the train?
  24. 24.718 − 404 =
  25. 25.? − 150 = 276
  26. 26.516 − ? = 406
  27. 27.586 + 215 =
  28. 28.A train has 590 people in the front coaches and 384 people in the back coaches. How many people are on the train?
  29. 29.248 + 370 =
  30. 30.A school has 955 children. 918 of them are girls. How many boys are there?
  31. 31.867 − 421 =
  32. 32.A train has 268 people in the front coaches and 620 people in the back coaches. How many people are on the train?
  33. 33.A school has 293 children. 183 of them are girls. How many boys are there?
  34. 34.747 + ? = 982
  35. 35.A train has 237 people in the front coaches and 507 people in the back coaches. How many people are on the train?
  36. 36.381 + ? = 839
  37. 37.? + 411 = 549
  38. 38.869 + 114 =
  39. 39.? + 326 = 681
  40. 40.A train has 269 people in the front coaches and 342 people in the back coaches. How many people are on the train?

Answer key

  1. 227
  2. 499
  3. 447
  4. 426
  5. 115
  6. 462
  7. 164
  8. 766
  9. 42
  10. 990
  11. 409
  12. 122
  13. 178
  14. 251
  15. 41
  16. 330
  17. 130
  18. 157
  19. 313
  20. 842
  21. 972
  22. 942
  23. 515
  24. 314
  25. 426
  26. 110
  27. 801
  28. 974
  29. 618
  30. 37
  31. 446
  32. 888
  33. 110
  34. 235
  35. 744
  36. 458
  37. 138
  38. 983
  39. 355
  40. 611

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