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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 893 · 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 189 people in the front coaches and 797 people in the back coaches. How many people are on the train?
  2. 2.A train has 329 people in the front coaches and 545 people in the back coaches. How many people are on the train?
  3. 3.? − 289 = 164
  4. 4.A train has 351 people in the front coaches and 212 people in the back coaches. How many people are on the train?
  5. 5.756 + ? = 974
  6. 6.A train has 174 people in the front coaches and 745 people in the back coaches. How many people are on the train?
  7. 7.A train has 606 people in the front coaches and 221 people in the back coaches. How many people are on the train?
  8. 8.298 + 324 =
  9. 9.A school has 885 children. 878 of them are girls. How many boys are there?
  10. 10.503 + 240 =
  11. 11.612 + ? = 857
  12. 12.569 − 543 =
  13. 13.A school has 488 children. 336 of them are girls. How many boys are there?
  14. 14.A train has 424 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  15. 15.423 + 109 =
  16. 16.357 + 454 =
  17. 17.169 + 305 =
  18. 18.640 + 153 =
  19. 19.A train has 337 people in the front coaches and 545 people in the back coaches. How many people are on the train?
  20. 20.A train has 698 people in the front coaches and 279 people in the back coaches. How many people are on the train?
  21. 21.A train has 827 people in the front coaches and 133 people in the back coaches. How many people are on the train?
  22. 22.? − 485 = 339
  23. 23.? + 113 = 371
  24. 24.313 + 148 =
  25. 25.821 + ? = 975
  26. 26.A train has 245 people in the front coaches and 619 people in the back coaches. How many people are on the train?
  27. 27.531 − 209 =
  28. 28.584 − 182 =
  29. 29.? − 756 = 134
  30. 30.A school has 601 children. 486 of them are girls. How many boys are there?
  31. 31.A school has 564 children. 311 of them are girls. How many boys are there?
  32. 32.? − 237 = 393
  33. 33.A train has 167 people in the front coaches and 268 people in the back coaches. How many people are on the train?
  34. 34.? − 128 = 372
  35. 35.648 − 646 =
  36. 36.855 − 192 =
  37. 37.909 − 263 =
  38. 38.A train has 531 people in the front coaches and 386 people in the back coaches. How many people are on the train?
  39. 39.A train has 286 people in the front coaches and 208 people in the back coaches. How many people are on the train?
  40. 40.A school has 741 children. 618 of them are girls. How many boys are there?

Answer key

  1. 986
  2. 874
  3. 453
  4. 563
  5. 218
  6. 919
  7. 827
  8. 622
  9. 7
  10. 743
  11. 245
  12. 26
  13. 152
  14. 603
  15. 532
  16. 811
  17. 474
  18. 793
  19. 882
  20. 977
  21. 960
  22. 824
  23. 258
  24. 461
  25. 154
  26. 864
  27. 322
  28. 402
  29. 890
  30. 115
  31. 253
  32. 630
  33. 435
  34. 500
  35. 2
  36. 663
  37. 646
  38. 917
  39. 494
  40. 123

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