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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 410 · 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. 1.155 + 700 =
  2. 2.A train has 398 people in the front coaches and 220 people in the back coaches. How many people are on the train?
  3. 3.290 + 599 =
  4. 4.A school has 508 children. 243 of them are girls. How many boys are there?
  5. 5.325 + ? = 865
  6. 6.A train has 294 people in the front coaches and 544 people in the back coaches. How many people are on the train?
  7. 7.531 + ? = 824
  8. 8.? − 153 = 310
  9. 9.883 − 810 =
  10. 10.A school has 654 children. 105 of them are girls. How many boys are there?
  11. 11.571 − 251 =
  12. 12.A train has 733 people in the front coaches and 265 people in the back coaches. How many people are on the train?
  13. 13.212 − 112 =
  14. 14.860 − 732 =
  15. 15.222 − ? = 67
  16. 16.406 + ? = 615
  17. 17.564 − 264 =
  18. 18.A train has 307 people in the front coaches and 465 people in the back coaches. How many people are on the train?
  19. 19.587 + 305 =
  20. 20.279 + 146 =
  21. 21.? + 490 = 591
  22. 22.791 + 186 =
  23. 23.229 − 152 =
  24. 24.261 + ? = 734
  25. 25.950 − ? = 814
  26. 26.303 + 127 =
  27. 27.889 + 105 =
  28. 28.A school has 689 children. 284 of them are girls. How many boys are there?
  29. 29.250 − 210 =
  30. 30.527 + 302 =
  31. 31.? − 276 = 709
  32. 32.? − 442 = 68
  33. 33.A train has 570 people in the front coaches and 292 people in the back coaches. How many people are on the train?
  34. 34.? − 289 = 62
  35. 35.871 + ? = 974
  36. 36.266 − 105 =
  37. 37.503 + 470 =
  38. 38.A train has 857 people in the front coaches and 122 people in the back coaches. How many people are on the train?
  39. 39.? − 131 = 534
  40. 40.A train has 564 people in the front coaches and 431 people in the back coaches. How many people are on the train?

Answer key

  1. 855
  2. 618
  3. 889
  4. 265
  5. 540
  6. 838
  7. 293
  8. 463
  9. 73
  10. 549
  11. 320
  12. 998
  13. 100
  14. 128
  15. 155
  16. 209
  17. 300
  18. 772
  19. 892
  20. 425
  21. 101
  22. 977
  23. 77
  24. 473
  25. 136
  26. 430
  27. 994
  28. 405
  29. 40
  30. 829
  31. 985
  32. 510
  33. 862
  34. 351
  35. 103
  36. 161
  37. 973
  38. 979
  39. 665
  40. 995

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