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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 874 · 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. 1.556 − 206 =
  2. 2.? + 275 = 765
  3. 3.A school has 628 children. 593 of them are girls. How many boys are there?
  4. 4.332 + ? = 608
  5. 5.441 + ? = 705
  6. 6.450 − 292 =
  7. 7.A train has 211 people in the front coaches and 763 people in the back coaches. How many people are on the train?
  8. 8.A train has 409 people in the front coaches and 419 people in the back coaches. How many people are on the train?
  9. 9.877 − 599 =
  10. 10.899 − ? = 778
  11. 11.488 + ? = 650
  12. 12.586 − 341 =
  13. 13.247 + ? = 616
  14. 14.A school has 598 children. 152 of them are girls. How many boys are there?
  15. 15.A train has 504 people in the front coaches and 441 people in the back coaches. How many people are on the train?
  16. 16.804 − ? = 186
  17. 17.197 + 734 =
  18. 18.308 + 280 =
  19. 19.A school has 444 children. 229 of them are girls. How many boys are there?
  20. 20.297 + 148 =
  21. 21.408 + 366 =
  22. 22.842 − 568 =
  23. 23.201 − ? = 23
  24. 24.? + 149 = 846
  25. 25.919 − ? = 775
  26. 26.345 − 134 =
  27. 27.191 + 424 =
  28. 28.887 − ? = 38
  29. 29.556 − 104 =
  30. 30.A train has 183 people in the front coaches and 192 people in the back coaches. How many people are on the train?
  31. 31.A train has 660 people in the front coaches and 316 people in the back coaches. How many people are on the train?
  32. 32.A train has 117 people in the front coaches and 701 people in the back coaches. How many people are on the train?
  33. 33.185 + 298 =
  34. 34.A school has 674 children. 673 of them are girls. How many boys are there?
  35. 35.? − 253 = 109
  36. 36.? − 484 = 305
  37. 37.978 − 334 =
  38. 38.882 − ? = 12
  39. 39.A train has 549 people in the front coaches and 406 people in the back coaches. How many people are on the train?
  40. 40.A train has 692 people in the front coaches and 187 people in the back coaches. How many people are on the train?

Answer key

  1. 350
  2. 490
  3. 35
  4. 276
  5. 264
  6. 158
  7. 974
  8. 828
  9. 278
  10. 121
  11. 162
  12. 245
  13. 369
  14. 446
  15. 945
  16. 618
  17. 931
  18. 588
  19. 215
  20. 445
  21. 774
  22. 274
  23. 178
  24. 697
  25. 144
  26. 211
  27. 615
  28. 849
  29. 452
  30. 375
  31. 976
  32. 818
  33. 483
  34. 1
  35. 362
  36. 789
  37. 644
  38. 870
  39. 955
  40. 879

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