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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 467 · 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 572 people in the front coaches and 404 people in the back coaches. How many people are on the train?
  2. 2.A train has 474 people in the front coaches and 389 people in the back coaches. How many people are on the train?
  3. 3.937 − 525 =
  4. 4.614 + ? = 843
  5. 5.118 + 667 =
  6. 6.335 + 620 =
  7. 7.666 + 280 =
  8. 8.565 + ? = 854
  9. 9.883 − 115 =
  10. 10.A train has 729 people in the front coaches and 206 people in the back coaches. How many people are on the train?
  11. 11.? + 873 = 982
  12. 12.969 − ? = 231
  13. 13.A school has 645 children. 157 of them are girls. How many boys are there?
  14. 14.206 − 163 =
  15. 15.667 + 145 =
  16. 16.925 − 647 =
  17. 17.240 + 498 =
  18. 18.A train has 132 people in the front coaches and 828 people in the back coaches. How many people are on the train?
  19. 19.A train has 300 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  20. 20.664 + 297 =
  21. 21.367 − 326 =
  22. 22.952 − 306 =
  23. 23.? + 492 = 928
  24. 24.A train has 318 people in the front coaches and 648 people in the back coaches. How many people are on the train?
  25. 25.A school has 314 children. 308 of them are girls. How many boys are there?
  26. 26.159 + ? = 272
  27. 27.350 + 461 =
  28. 28.A train has 182 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  29. 29.? − 146 = 594
  30. 30.647 − ? = 133
  31. 31.217 + 445 =
  32. 32.889 − 267 =
  33. 33.407 + 550 =
  34. 34.A school has 445 children. 333 of them are girls. How many boys are there?
  35. 35.359 − 324 =
  36. 36.531 − 262 =
  37. 37.428 + ? = 569
  38. 38.A school has 403 children. 273 of them are girls. How many boys are there?
  39. 39.596 + ? = 811
  40. 40.323 − ? = 32

Answer key

  1. 976
  2. 863
  3. 412
  4. 229
  5. 785
  6. 955
  7. 946
  8. 289
  9. 768
  10. 935
  11. 109
  12. 738
  13. 488
  14. 43
  15. 812
  16. 278
  17. 738
  18. 960
  19. 413
  20. 961
  21. 41
  22. 646
  23. 436
  24. 966
  25. 6
  26. 113
  27. 811
  28. 340
  29. 740
  30. 514
  31. 662
  32. 622
  33. 957
  34. 112
  35. 35
  36. 269
  37. 141
  38. 130
  39. 215
  40. 291

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