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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 36 · 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. 1.247 + 247 =
  2. 2.238 − ? = 61
  3. 3.287 − 247 =
  4. 4.? − 743 = 5
  5. 5.456 − 105 =
  6. 6.A train has 196 people in the front coaches and 646 people in the back coaches. How many people are on the train?
  7. 7.A school has 579 children. 432 of them are girls. How many boys are there?
  8. 8.A school has 972 children. 409 of them are girls. How many boys are there?
  9. 9.480 + 198 =
  10. 10.354 + 180 =
  11. 11.A school has 939 children. 735 of them are girls. How many boys are there?
  12. 12.? + 200 = 371
  13. 13.511 + ? = 804
  14. 14.A train has 588 people in the front coaches and 279 people in the back coaches. How many people are on the train?
  15. 15.364 + 196 =
  16. 16.A school has 424 children. 103 of them are girls. How many boys are there?
  17. 17.A school has 270 children. 195 of them are girls. How many boys are there?
  18. 18.A school has 637 children. 231 of them are girls. How many boys are there?
  19. 19.A school has 698 children. 314 of them are girls. How many boys are there?
  20. 20.A train has 203 people in the front coaches and 211 people in the back coaches. How many people are on the train?
  21. 21.422 + ? = 755
  22. 22.222 − 218 =
  23. 23.859 + 113 =
  24. 24.A train has 313 people in the front coaches and 664 people in the back coaches. How many people are on the train?
  25. 25.A school has 758 children. 320 of them are girls. How many boys are there?
  26. 26.443 − 157 =
  27. 27.? + 837 = 940
  28. 28.635 − ? = 394
  29. 29.A train has 805 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  30. 30.? + 219 = 583
  31. 31.A train has 262 people in the front coaches and 631 people in the back coaches. How many people are on the train?
  32. 32.673 − ? = 465
  33. 33.535 + 316 =
  34. 34.602 + 387 =
  35. 35.706 − 645 =
  36. 36.? + 168 = 357
  37. 37.857 − 839 =
  38. 38.542 + ? = 917
  39. 39.510 − ? = 204
  40. 40.307 + 334 =

Answer key

  1. 494
  2. 177
  3. 40
  4. 748
  5. 351
  6. 842
  7. 147
  8. 563
  9. 678
  10. 534
  11. 204
  12. 171
  13. 293
  14. 867
  15. 560
  16. 321
  17. 75
  18. 406
  19. 384
  20. 414
  21. 333
  22. 4
  23. 972
  24. 977
  25. 438
  26. 286
  27. 103
  28. 241
  29. 914
  30. 364
  31. 893
  32. 208
  33. 851
  34. 989
  35. 61
  36. 189
  37. 18
  38. 375
  39. 306
  40. 641

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