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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 130 · 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 172 people in the front coaches and 484 people in the back coaches. How many people are on the train?
  2. 2.209 + 195 =
  3. 3.975 − ? = 868
  4. 4.357 + 584 =
  5. 5.A school has 689 children. 168 of them are girls. How many boys are there?
  6. 6.A train has 343 people in the front coaches and 594 people in the back coaches. How many people are on the train?
  7. 7.315 − 137 =
  8. 8.502 + ? = 918
  9. 9.A train has 598 people in the front coaches and 306 people in the back coaches. How many people are on the train?
  10. 10.508 + 304 =
  11. 11.? − 435 = 89
  12. 12.512 + ? = 984
  13. 13.593 − 481 =
  14. 14.416 − 315 =
  15. 15.? − 539 = 219
  16. 16.871 + 120 =
  17. 17.874 + 101 =
  18. 18.? − 286 = 141
  19. 19.572 − ? = 4
  20. 20.479 − 289 =
  21. 21.714 + 161 =
  22. 22.? − 142 = 295
  23. 23.? − 298 = 345
  24. 24.A school has 544 children. 125 of them are girls. How many boys are there?
  25. 25.326 − 266 =
  26. 26.914 − 652 =
  27. 27.A school has 674 children. 380 of them are girls. How many boys are there?
  28. 28.? + 259 = 953
  29. 29.A school has 412 children. 214 of them are girls. How many boys are there?
  30. 30.582 + 391 =
  31. 31.A school has 969 children. 762 of them are girls. How many boys are there?
  32. 32.A train has 105 people in the front coaches and 483 people in the back coaches. How many people are on the train?
  33. 33.A train has 107 people in the front coaches and 768 people in the back coaches. How many people are on the train?
  34. 34.? − 225 = 693
  35. 35.787 + 162 =
  36. 36.889 − 308 =
  37. 37.527 − 430 =
  38. 38.506 + ? = 635
  39. 39.A school has 388 children. 155 of them are girls. How many boys are there?
  40. 40.500 − 262 =

Answer key

  1. 656
  2. 404
  3. 107
  4. 941
  5. 521
  6. 937
  7. 178
  8. 416
  9. 904
  10. 812
  11. 524
  12. 472
  13. 112
  14. 101
  15. 758
  16. 991
  17. 975
  18. 427
  19. 568
  20. 190
  21. 875
  22. 437
  23. 643
  24. 419
  25. 60
  26. 262
  27. 294
  28. 694
  29. 198
  30. 973
  31. 207
  32. 588
  33. 875
  34. 918
  35. 949
  36. 581
  37. 97
  38. 129
  39. 233
  40. 238

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