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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 535 · 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. 1.878 − 518 =
  2. 2.816 + 117 =
  3. 3.948 − 304 =
  4. 4.581 − 189 =
  5. 5.A train has 552 people in the front coaches and 415 people in the back coaches. How many people are on the train?
  6. 6.A school has 887 children. 162 of them are girls. How many boys are there?
  7. 7.297 + 101 =
  8. 8.915 − ? = 283
  9. 9.152 + 211 =
  10. 10.891 + ? = 992
  11. 11.A school has 812 children. 666 of them are girls. How many boys are there?
  12. 12.314 − ? = 62
  13. 13.A school has 876 children. 683 of them are girls. How many boys are there?
  14. 14.551 − 513 =
  15. 15.572 − ? = 167
  16. 16.A train has 380 people in the front coaches and 430 people in the back coaches. How many people are on the train?
  17. 17.767 + 211 =
  18. 18.284 + 324 =
  19. 19.A school has 405 children. 133 of them are girls. How many boys are there?
  20. 20.? + 260 = 557
  21. 21.106 + 679 =
  22. 22.A train has 374 people in the front coaches and 578 people in the back coaches. How many people are on the train?
  23. 23.299 − 277 =
  24. 24.A train has 257 people in the front coaches and 511 people in the back coaches. How many people are on the train?
  25. 25.565 − 500 =
  26. 26.? + 411 = 823
  27. 27.664 + ? = 766
  28. 28.A school has 810 children. 139 of them are girls. How many boys are there?
  29. 29.255 + 583 =
  30. 30.334 − 233 =
  31. 31.771 + 182 =
  32. 32.879 − ? = 738
  33. 33.A school has 458 children. 125 of them are girls. How many boys are there?
  34. 34.770 − 423 =
  35. 35.A school has 781 children. 172 of them are girls. How many boys are there?
  36. 36.137 + 292 =
  37. 37.792 − 508 =
  38. 38.A school has 752 children. 495 of them are girls. How many boys are there?
  39. 39.? + 892 = 994
  40. 40.910 − 134 =

Answer key

  1. 360
  2. 933
  3. 644
  4. 392
  5. 967
  6. 725
  7. 398
  8. 632
  9. 363
  10. 101
  11. 146
  12. 252
  13. 193
  14. 38
  15. 405
  16. 810
  17. 978
  18. 608
  19. 272
  20. 297
  21. 785
  22. 952
  23. 22
  24. 768
  25. 65
  26. 412
  27. 102
  28. 671
  29. 838
  30. 101
  31. 953
  32. 141
  33. 333
  34. 347
  35. 609
  36. 429
  37. 284
  38. 257
  39. 102
  40. 776

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