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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 162 · 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.? − 440 = 61
  2. 2.310 + 299 =
  3. 3.423 − ? = 140
  4. 4.A train has 173 people in the front coaches and 547 people in the back coaches. How many people are on the train?
  5. 5.662 + 328 =
  6. 6.996 − 187 =
  7. 7.256 + 425 =
  8. 8.? + 608 = 929
  9. 9.535 − 280 =
  10. 10.A train has 493 people in the front coaches and 264 people in the back coaches. How many people are on the train?
  11. 11.? − 526 = 159
  12. 12.613 − 208 =
  13. 13.228 + 107 =
  14. 14.A train has 355 people in the front coaches and 313 people in the back coaches. How many people are on the train?
  15. 15.604 − ? = 374
  16. 16.406 − 190 =
  17. 17.202 + ? = 379
  18. 18.A train has 272 people in the front coaches and 639 people in the back coaches. How many people are on the train?
  19. 19.? − 183 = 90
  20. 20.393 + 540 =
  21. 21.556 − 543 =
  22. 22.498 + ? = 906
  23. 23.557 − 349 =
  24. 24.965 − 764 =
  25. 25.? + 679 = 827
  26. 26.? − 258 = 218
  27. 27.A school has 651 children. 240 of them are girls. How many boys are there?
  28. 28.589 − 123 =
  29. 29.382 − 303 =
  30. 30.? − 162 = 113
  31. 31.A school has 625 children. 529 of them are girls. How many boys are there?
  32. 32.A school has 431 children. 183 of them are girls. How many boys are there?
  33. 33.348 + 429 =
  34. 34.881 − 635 =
  35. 35.A train has 470 people in the front coaches and 394 people in the back coaches. How many people are on the train?
  36. 36.807 − 270 =
  37. 37.? − 333 = 351
  38. 38.A school has 666 children. 602 of them are girls. How many boys are there?
  39. 39.649 − 396 =
  40. 40.A train has 195 people in the front coaches and 656 people in the back coaches. How many people are on the train?

Answer key

  1. 501
  2. 609
  3. 283
  4. 720
  5. 990
  6. 809
  7. 681
  8. 321
  9. 255
  10. 757
  11. 685
  12. 405
  13. 335
  14. 668
  15. 230
  16. 216
  17. 177
  18. 911
  19. 273
  20. 933
  21. 13
  22. 408
  23. 208
  24. 201
  25. 148
  26. 476
  27. 411
  28. 466
  29. 79
  30. 275
  31. 96
  32. 248
  33. 777
  34. 246
  35. 864
  36. 537
  37. 684
  38. 64
  39. 253
  40. 851

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