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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 17 · 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. 1.122 + 419 =
  2. 2.346 + 526 =
  3. 3.A school has 368 children. 220 of them are girls. How many boys are there?
  4. 4.874 − 807 =
  5. 5.A train has 110 people in the front coaches and 623 people in the back coaches. How many people are on the train?
  6. 6.960 − 923 =
  7. 7.861 + 110 =
  8. 8.A school has 446 children. 171 of them are girls. How many boys are there?
  9. 9.859 − ? = 619
  10. 10.221 + 453 =
  11. 11.A school has 992 children. 113 of them are girls. How many boys are there?
  12. 12.155 + 610 =
  13. 13.763 + ? = 987
  14. 14.640 − 581 =
  15. 15.A school has 455 children. 139 of them are girls. How many boys are there?
  16. 16.A train has 257 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  17. 17.953 − 297 =
  18. 18.344 + 122 =
  19. 19.200 + 207 =
  20. 20.A school has 800 children. 639 of them are girls. How many boys are there?
  21. 21.? + 451 = 678
  22. 22.408 + ? = 876
  23. 23.A train has 142 people in the front coaches and 392 people in the back coaches. How many people are on the train?
  24. 24.A school has 671 children. 328 of them are girls. How many boys are there?
  25. 25.A train has 196 people in the front coaches and 393 people in the back coaches. How many people are on the train?
  26. 26.272 + 343 =
  27. 27.A school has 246 children. 235 of them are girls. How many boys are there?
  28. 28.A school has 672 children. 536 of them are girls. How many boys are there?
  29. 29.548 + 260 =
  30. 30.? + 192 = 939
  31. 31.634 − 180 =
  32. 32.381 + 331 =
  33. 33.? + 620 = 903
  34. 34.A train has 590 people in the front coaches and 177 people in the back coaches. How many people are on the train?
  35. 35.349 + 550 =
  36. 36.295 − 133 =
  37. 37.941 − ? = 494
  38. 38.A train has 154 people in the front coaches and 585 people in the back coaches. How many people are on the train?
  39. 39.830 + 168 =
  40. 40.586 + 210 =

Answer key

  1. 541
  2. 872
  3. 148
  4. 67
  5. 733
  6. 37
  7. 971
  8. 275
  9. 240
  10. 674
  11. 879
  12. 765
  13. 224
  14. 59
  15. 316
  16. 415
  17. 656
  18. 466
  19. 407
  20. 161
  21. 227
  22. 468
  23. 534
  24. 343
  25. 589
  26. 615
  27. 11
  28. 136
  29. 808
  30. 747
  31. 454
  32. 712
  33. 283
  34. 767
  35. 899
  36. 162
  37. 447
  38. 739
  39. 998
  40. 796

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