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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 835 · 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.? − 113 = 158
  2. 2.234 − ? = 58
  3. 3.A train has 185 people in the front coaches and 167 people in the back coaches. How many people are on the train?
  4. 4.308 − 239 =
  5. 5.A train has 126 people in the front coaches and 206 people in the back coaches. How many people are on the train?
  6. 6.145 + 613 =
  7. 7.A train has 300 people in the front coaches and 218 people in the back coaches. How many people are on the train?
  8. 8.943 − 681 =
  9. 9.188 + 105 =
  10. 10.718 + 189 =
  11. 11.752 + 103 =
  12. 12.A train has 671 people in the front coaches and 318 people in the back coaches. How many people are on the train?
  13. 13.A train has 881 people in the front coaches and 103 people in the back coaches. How many people are on the train?
  14. 14.? + 828 = 968
  15. 15.A train has 297 people in the front coaches and 400 people in the back coaches. How many people are on the train?
  16. 16.381 + ? = 948
  17. 17.? + 588 = 977
  18. 18.692 − 297 =
  19. 19.A school has 324 children. 130 of them are girls. How many boys are there?
  20. 20.161 + 224 =
  21. 21.? + 629 = 735
  22. 22.A train has 163 people in the front coaches and 277 people in the back coaches. How many people are on the train?
  23. 23.899 − ? = 244
  24. 24.426 + ? = 814
  25. 25.A school has 443 children. 349 of them are girls. How many boys are there?
  26. 26.A school has 417 children. 147 of them are girls. How many boys are there?
  27. 27.? − 248 = 331
  28. 28.A school has 971 children. 725 of them are girls. How many boys are there?
  29. 29.798 + ? = 954
  30. 30.? − 387 = 61
  31. 31.422 + 176 =
  32. 32.503 + 158 =
  33. 33.? − 435 = 17
  34. 34.192 + 266 =
  35. 35.900 − 222 =
  36. 36.? − 251 = 332
  37. 37.? + 798 = 941
  38. 38.A school has 307 children. 161 of them are girls. How many boys are there?
  39. 39.896 + 100 =
  40. 40.A school has 301 children. 293 of them are girls. How many boys are there?

Answer key

  1. 271
  2. 176
  3. 352
  4. 69
  5. 332
  6. 758
  7. 518
  8. 262
  9. 293
  10. 907
  11. 855
  12. 989
  13. 984
  14. 140
  15. 697
  16. 567
  17. 389
  18. 395
  19. 194
  20. 385
  21. 106
  22. 440
  23. 655
  24. 388
  25. 94
  26. 270
  27. 579
  28. 246
  29. 156
  30. 448
  31. 598
  32. 661
  33. 452
  34. 458
  35. 678
  36. 583
  37. 143
  38. 146
  39. 996
  40. 8

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