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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 559 · 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. 1.350 − 137 =
  2. 2.A school has 744 children. 568 of them are girls. How many boys are there?
  3. 3.A train has 170 people in the front coaches and 663 people in the back coaches. How many people are on the train?
  4. 4.375 + 200 =
  5. 5.? + 303 = 503
  6. 6.A train has 781 people in the front coaches and 188 people in the back coaches. How many people are on the train?
  7. 7.256 + 286 =
  8. 8.A train has 658 people in the front coaches and 139 people in the back coaches. How many people are on the train?
  9. 9.753 − 687 =
  10. 10.A school has 367 children. 207 of them are girls. How many boys are there?
  11. 11.182 + 120 =
  12. 12.759 + 238 =
  13. 13.673 + 284 =
  14. 14.772 − 210 =
  15. 15.? + 494 = 615
  16. 16.? + 149 = 446
  17. 17.A school has 751 children. 207 of them are girls. How many boys are there?
  18. 18.A school has 746 children. 223 of them are girls. How many boys are there?
  19. 19.500 + 394 =
  20. 20.919 − 316 =
  21. 21.? − 217 = 596
  22. 22.? + 778 = 929
  23. 23.786 + 164 =
  24. 24.? + 780 = 886
  25. 25.A school has 539 children. 310 of them are girls. How many boys are there?
  26. 26.926 − ? = 2
  27. 27.A train has 466 people in the front coaches and 512 people in the back coaches. How many people are on the train?
  28. 28.490 + ? = 680
  29. 29.598 + 349 =
  30. 30.595 + 138 =
  31. 31.A school has 418 children. 411 of them are girls. How many boys are there?
  32. 32.533 − ? = 248
  33. 33.579 − ? = 464
  34. 34.A school has 295 children. 225 of them are girls. How many boys are there?
  35. 35.905 − 884 =
  36. 36.? + 276 = 653
  37. 37.633 + 103 =
  38. 38.A train has 889 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  39. 39.485 + ? = 971
  40. 40.618 − 126 =

Answer key

  1. 213
  2. 176
  3. 833
  4. 575
  5. 200
  6. 969
  7. 542
  8. 797
  9. 66
  10. 160
  11. 302
  12. 997
  13. 957
  14. 562
  15. 121
  16. 297
  17. 544
  18. 523
  19. 894
  20. 603
  21. 813
  22. 151
  23. 950
  24. 106
  25. 229
  26. 924
  27. 978
  28. 190
  29. 947
  30. 733
  31. 7
  32. 285
  33. 115
  34. 70
  35. 21
  36. 377
  37. 736
  38. 990
  39. 486
  40. 492

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