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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 880 · 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.? + 135 = 453
  2. 2.477 − 452 =
  3. 3.A train has 362 people in the front coaches and 389 people in the back coaches. How many people are on the train?
  4. 4.294 + 307 =
  5. 5.591 + 180 =
  6. 6.139 + 156 =
  7. 7.819 − 232 =
  8. 8.A school has 208 children. 130 of them are girls. How many boys are there?
  9. 9.A school has 945 children. 475 of them are girls. How many boys are there?
  10. 10.820 − ? = 99
  11. 11.955 − 205 =
  12. 12.877 + 116 =
  13. 13.A train has 131 people in the front coaches and 433 people in the back coaches. How many people are on the train?
  14. 14.112 + 417 =
  15. 15.A school has 755 children. 544 of them are girls. How many boys are there?
  16. 16.A train has 894 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  17. 17.A train has 689 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  18. 18.438 + 288 =
  19. 19.918 − ? = 26
  20. 20.A school has 841 children. 293 of them are girls. How many boys are there?
  21. 21.135 + 548 =
  22. 22.A train has 871 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  23. 23.878 − 234 =
  24. 24.604 + 354 =
  25. 25.584 + 338 =
  26. 26.A train has 867 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  27. 27.A school has 227 children. 148 of them are girls. How many boys are there?
  28. 28.? + 455 = 988
  29. 29.662 + 258 =
  30. 30.236 − 165 =
  31. 31.366 + ? = 629
  32. 32.295 + 170 =
  33. 33.197 + 748 =
  34. 34.875 + 115 =
  35. 35.638 + 329 =
  36. 36.443 − 197 =
  37. 37.747 − 377 =
  38. 38.373 − 170 =
  39. 39.600 + 261 =
  40. 40.A train has 439 people in the front coaches and 268 people in the back coaches. How many people are on the train?

Answer key

  1. 318
  2. 25
  3. 751
  4. 601
  5. 771
  6. 295
  7. 587
  8. 78
  9. 470
  10. 721
  11. 750
  12. 993
  13. 564
  14. 529
  15. 211
  16. 994
  17. 789
  18. 726
  19. 892
  20. 548
  21. 683
  22. 989
  23. 644
  24. 958
  25. 922
  26. 980
  27. 79
  28. 533
  29. 920
  30. 71
  31. 263
  32. 465
  33. 945
  34. 990
  35. 967
  36. 246
  37. 370
  38. 203
  39. 861
  40. 707

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