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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 54 · 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. 1.168 + 306 =
  2. 2.A train has 183 people in the front coaches and 663 people in the back coaches. How many people are on the train?
  3. 3.271 + ? = 468
  4. 4.174 + ? = 891
  5. 5.A train has 242 people in the front coaches and 134 people in the back coaches. How many people are on the train?
  6. 6.A school has 280 children. 108 of them are girls. How many boys are there?
  7. 7.318 + 250 =
  8. 8.752 − 174 =
  9. 9.238 + 277 =
  10. 10.700 + 235 =
  11. 11.A school has 566 children. 384 of them are girls. How many boys are there?
  12. 12.339 + 367 =
  13. 13.A school has 693 children. 251 of them are girls. How many boys are there?
  14. 14.205 − 108 =
  15. 15.A school has 814 children. 455 of them are girls. How many boys are there?
  16. 16.A train has 602 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  17. 17.669 + 116 =
  18. 18.? + 507 = 775
  19. 19.852 − 784 =
  20. 20.560 + 435 =
  21. 21.409 + 430 =
  22. 22.250 − ? = 89
  23. 23.A train has 631 people in the front coaches and 155 people in the back coaches. How many people are on the train?
  24. 24.A train has 613 people in the front coaches and 209 people in the back coaches. How many people are on the train?
  25. 25.228 − ? = 10
  26. 26.635 − 357 =
  27. 27.? + 765 = 975
  28. 28.? − 155 = 582
  29. 29.896 + 102 =
  30. 30.937 − 439 =
  31. 31.A school has 492 children. 124 of them are girls. How many boys are there?
  32. 32.836 + 135 =
  33. 33.946 − 586 =
  34. 34.446 + 387 =
  35. 35.? − 293 = 171
  36. 36.669 − 653 =
  37. 37.A school has 762 children. 703 of them are girls. How many boys are there?
  38. 38.A school has 655 children. 228 of them are girls. How many boys are there?
  39. 39.555 − 465 =
  40. 40.316 − 277 =

Answer key

  1. 474
  2. 846
  3. 197
  4. 717
  5. 376
  6. 172
  7. 568
  8. 578
  9. 515
  10. 935
  11. 182
  12. 706
  13. 442
  14. 97
  15. 359
  16. 754
  17. 785
  18. 268
  19. 68
  20. 995
  21. 839
  22. 161
  23. 786
  24. 822
  25. 218
  26. 278
  27. 210
  28. 737
  29. 998
  30. 498
  31. 368
  32. 971
  33. 360
  34. 833
  35. 464
  36. 16
  37. 59
  38. 427
  39. 90
  40. 39

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