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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 174 · 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. 1.520 − 458 =
  2. 2.A train has 286 people in the front coaches and 622 people in the back coaches. How many people are on the train?
  3. 3.593 − 531 =
  4. 4.A school has 529 children. 328 of them are girls. How many boys are there?
  5. 5.? − 495 = 203
  6. 6.228 − 102 =
  7. 7.752 + 225 =
  8. 8.816 + 112 =
  9. 9.A train has 343 people in the front coaches and 351 people in the back coaches. How many people are on the train?
  10. 10.201 − 133 =
  11. 11.A school has 843 children. 569 of them are girls. How many boys are there?
  12. 12.A school has 409 children. 360 of them are girls. How many boys are there?
  13. 13.217 + ? = 568
  14. 14.354 − ? = 168
  15. 15.A school has 363 children. 154 of them are girls. How many boys are there?
  16. 16.417 − 134 =
  17. 17.388 − 310 =
  18. 18.A school has 278 children. 175 of them are girls. How many boys are there?
  19. 19.A train has 237 people in the front coaches and 352 people in the back coaches. How many people are on the train?
  20. 20.A school has 301 children. 183 of them are girls. How many boys are there?
  21. 21.A train has 781 people in the front coaches and 190 people in the back coaches. How many people are on the train?
  22. 22.320 − 276 =
  23. 23.693 − 689 =
  24. 24.223 + ? = 686
  25. 25.241 − ? = 88
  26. 26.A school has 657 children. 275 of them are girls. How many boys are there?
  27. 27.201 + ? = 602
  28. 28.432 + 517 =
  29. 29.A train has 876 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  30. 30.744 − ? = 179
  31. 31.A train has 452 people in the front coaches and 412 people in the back coaches. How many people are on the train?
  32. 32.334 + 615 =
  33. 33.A train has 778 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  34. 34.? + 425 = 766
  35. 35.118 + 806 =
  36. 36.? + 310 = 442
  37. 37.556 − 488 =
  38. 38.323 − 287 =
  39. 39.800 + ? = 972
  40. 40.? − 155 = 51

Answer key

  1. 62
  2. 908
  3. 62
  4. 201
  5. 698
  6. 126
  7. 977
  8. 928
  9. 694
  10. 68
  11. 274
  12. 49
  13. 351
  14. 186
  15. 209
  16. 283
  17. 78
  18. 103
  19. 589
  20. 118
  21. 971
  22. 44
  23. 4
  24. 463
  25. 153
  26. 382
  27. 401
  28. 949
  29. 981
  30. 565
  31. 864
  32. 949
  33. 903
  34. 341
  35. 924
  36. 132
  37. 68
  38. 36
  39. 172
  40. 206

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