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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 979 · 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. 1.549 − 447 =
  2. 2.? + 831 = 984
  3. 3.413 − 365 =
  4. 4.A train has 297 people in the front coaches and 536 people in the back coaches. How many people are on the train?
  5. 5.A train has 162 people in the front coaches and 514 people in the back coaches. How many people are on the train?
  6. 6.A school has 533 children. 235 of them are girls. How many boys are there?
  7. 7.A school has 212 children. 204 of them are girls. How many boys are there?
  8. 8.405 − ? = 121
  9. 9.A train has 622 people in the front coaches and 327 people in the back coaches. How many people are on the train?
  10. 10.536 − 170 =
  11. 11.406 − 367 =
  12. 12.A school has 370 children. 313 of them are girls. How many boys are there?
  13. 13.A school has 879 children. 530 of them are girls. How many boys are there?
  14. 14.A train has 675 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  15. 15.572 − 152 =
  16. 16.A train has 641 people in the front coaches and 356 people in the back coaches. How many people are on the train?
  17. 17.? − 273 = 88
  18. 18.A train has 832 people in the front coaches and 162 people in the back coaches. How many people are on the train?
  19. 19.760 − 473 =
  20. 20.236 + ? = 879
  21. 21.835 + 112 =
  22. 22.598 + ? = 816
  23. 23.A train has 627 people in the front coaches and 172 people in the back coaches. How many people are on the train?
  24. 24.144 + 205 =
  25. 25.166 + 104 =
  26. 26.A train has 653 people in the front coaches and 149 people in the back coaches. How many people are on the train?
  27. 27.252 + ? = 879
  28. 28.A train has 600 people in the front coaches and 347 people in the back coaches. How many people are on the train?
  29. 29.488 − 465 =
  30. 30.825 − 388 =
  31. 31.205 − 138 =
  32. 32.791 + 160 =
  33. 33.? + 611 = 728
  34. 34.? − 243 = 95
  35. 35.A train has 392 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  36. 36.549 + 430 =
  37. 37.A school has 549 children. 460 of them are girls. How many boys are there?
  38. 38.A school has 571 children. 220 of them are girls. How many boys are there?
  39. 39.A train has 455 people in the front coaches and 107 people in the back coaches. How many people are on the train?
  40. 40.A train has 301 people in the front coaches and 492 people in the back coaches. How many people are on the train?

Answer key

  1. 102
  2. 153
  3. 48
  4. 833
  5. 676
  6. 298
  7. 8
  8. 284
  9. 949
  10. 366
  11. 39
  12. 57
  13. 349
  14. 813
  15. 420
  16. 997
  17. 361
  18. 994
  19. 287
  20. 643
  21. 947
  22. 218
  23. 799
  24. 349
  25. 270
  26. 802
  27. 627
  28. 947
  29. 23
  30. 437
  31. 67
  32. 951
  33. 117
  34. 338
  35. 551
  36. 979
  37. 89
  38. 351
  39. 562
  40. 793

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