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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 754 · 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 train has 529 people in the front coaches and 244 people in the back coaches. How many people are on the train?
  2. 2.249 + 216 =
  3. 3.? − 200 = 126
  4. 4.653 + 273 =
  5. 5.? + 131 = 693
  6. 6.A train has 364 people in the front coaches and 201 people in the back coaches. How many people are on the train?
  7. 7.731 − 137 =
  8. 8.975 − 335 =
  9. 9.486 + 383 =
  10. 10.122 + ? = 627
  11. 11.669 − ? = 521
  12. 12.? + 421 = 789
  13. 13.A school has 540 children. 415 of them are girls. How many boys are there?
  14. 14.110 + ? = 537
  15. 15.A train has 376 people in the front coaches and 305 people in the back coaches. How many people are on the train?
  16. 16.636 − 285 =
  17. 17.A school has 333 children. 222 of them are girls. How many boys are there?
  18. 18.519 − 381 =
  19. 19.A train has 432 people in the front coaches and 238 people in the back coaches. How many people are on the train?
  20. 20.741 − 177 =
  21. 21.A train has 197 people in the front coaches and 585 people in the back coaches. How many people are on the train?
  22. 22.A school has 399 children. 260 of them are girls. How many boys are there?
  23. 23.742 + ? = 903
  24. 24.A train has 884 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  25. 25.554 − 453 =
  26. 26.A school has 822 children. 735 of them are girls. How many boys are there?
  27. 27.547 − 163 =
  28. 28.? + 535 = 844
  29. 29.871 − ? = 487
  30. 30.A train has 129 people in the front coaches and 248 people in the back coaches. How many people are on the train?
  31. 31.A school has 629 children. 397 of them are girls. How many boys are there?
  32. 32.869 + 117 =
  33. 33.350 − 292 =
  34. 34.631 + ? = 915
  35. 35.? − 491 = 86
  36. 36.? − 258 = 56
  37. 37.301 + 625 =
  38. 38.318 − ? = 14
  39. 39.? − 398 = 123
  40. 40.A school has 635 children. 590 of them are girls. How many boys are there?

Answer key

  1. 773
  2. 465
  3. 326
  4. 926
  5. 562
  6. 565
  7. 594
  8. 640
  9. 869
  10. 505
  11. 148
  12. 368
  13. 125
  14. 427
  15. 681
  16. 351
  17. 111
  18. 138
  19. 670
  20. 564
  21. 782
  22. 139
  23. 161
  24. 984
  25. 101
  26. 87
  27. 384
  28. 309
  29. 384
  30. 377
  31. 232
  32. 986
  33. 58
  34. 284
  35. 577
  36. 314
  37. 926
  38. 304
  39. 521
  40. 45

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