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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 755 · 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 882 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  2. 2.871 + 113 =
  3. 3.921 − ? = 742
  4. 4.998 − 953 =
  5. 5.A train has 836 people in the front coaches and 163 people in the back coaches. How many people are on the train?
  6. 6.243 − 199 =
  7. 7.986 − 100 =
  8. 8.414 + 462 =
  9. 9.710 − 202 =
  10. 10.? − 208 = 492
  11. 11.137 + 188 =
  12. 12.A train has 298 people in the front coaches and 218 people in the back coaches. How many people are on the train?
  13. 13.? + 433 = 556
  14. 14.363 − ? = 76
  15. 15.323 + 645 =
  16. 16.479 − ? = 344
  17. 17.A school has 212 children. 187 of them are girls. How many boys are there?
  18. 18.846 − ? = 530
  19. 19.697 − 313 =
  20. 20.A train has 614 people in the front coaches and 213 people in the back coaches. How many people are on the train?
  21. 21.774 + 203 =
  22. 22.830 − ? = 536
  23. 23.A school has 359 children. 124 of them are girls. How many boys are there?
  24. 24.266 − 107 =
  25. 25.A school has 733 children. 381 of them are girls. How many boys are there?
  26. 26.348 − 180 =
  27. 27.599 + 187 =
  28. 28.A train has 830 people in the front coaches and 117 people in the back coaches. How many people are on the train?
  29. 29.A school has 626 children. 298 of them are girls. How many boys are there?
  30. 30.A school has 752 children. 306 of them are girls. How many boys are there?
  31. 31.494 − 343 =
  32. 32.A train has 167 people in the front coaches and 231 people in the back coaches. How many people are on the train?
  33. 33.A train has 486 people in the front coaches and 194 people in the back coaches. How many people are on the train?
  34. 34.644 + ? = 824
  35. 35.A school has 857 children. 200 of them are girls. How many boys are there?
  36. 36.284 + 700 =
  37. 37.340 − 217 =
  38. 38.A train has 810 people in the front coaches and 160 people in the back coaches. How many people are on the train?
  39. 39.A train has 561 people in the front coaches and 295 people in the back coaches. How many people are on the train?
  40. 40.961 − 333 =

Answer key

  1. 983
  2. 984
  3. 179
  4. 45
  5. 999
  6. 44
  7. 886
  8. 876
  9. 508
  10. 700
  11. 325
  12. 516
  13. 123
  14. 287
  15. 968
  16. 135
  17. 25
  18. 316
  19. 384
  20. 827
  21. 977
  22. 294
  23. 235
  24. 159
  25. 352
  26. 168
  27. 786
  28. 947
  29. 328
  30. 446
  31. 151
  32. 398
  33. 680
  34. 180
  35. 657
  36. 984
  37. 123
  38. 970
  39. 856
  40. 628

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