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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 443 · 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 school has 627 children. 536 of them are girls. How many boys are there?
  2. 2.A train has 740 people in the front coaches and 178 people in the back coaches. How many people are on the train?
  3. 3.133 + ? = 699
  4. 4.482 − 267 =
  5. 5.688 − ? = 111
  6. 6.175 + 292 =
  7. 7.288 + ? = 647
  8. 8.695 − 515 =
  9. 9.A school has 908 children. 706 of them are girls. How many boys are there?
  10. 10.? − 107 = 137
  11. 11.187 + 126 =
  12. 12.A school has 926 children. 125 of them are girls. How many boys are there?
  13. 13.810 + ? = 952
  14. 14.A train has 592 people in the front coaches and 351 people in the back coaches. How many people are on the train?
  15. 15.A train has 162 people in the front coaches and 569 people in the back coaches. How many people are on the train?
  16. 16.A school has 451 children. 187 of them are girls. How many boys are there?
  17. 17.903 − 883 =
  18. 18.337 − ? = 68
  19. 19.386 + ? = 587
  20. 20.A train has 657 people in the front coaches and 211 people in the back coaches. How many people are on the train?
  21. 21.? − 147 = 309
  22. 22.344 − 292 =
  23. 23.A school has 501 children. 201 of them are girls. How many boys are there?
  24. 24.363 + ? = 759
  25. 25.740 − ? = 154
  26. 26.492 + 213 =
  27. 27.A school has 264 children. 213 of them are girls. How many boys are there?
  28. 28.? + 574 = 807
  29. 29.416 + 315 =
  30. 30.275 − ? = 141
  31. 31.409 + ? = 852
  32. 32.? − 244 = 75
  33. 33.A train has 710 people in the front coaches and 284 people in the back coaches. How many people are on the train?
  34. 34.A school has 464 children. 164 of them are girls. How many boys are there?
  35. 35.320 − 319 =
  36. 36.A train has 204 people in the front coaches and 400 people in the back coaches. How many people are on the train?
  37. 37.696 + 229 =
  38. 38.436 − 309 =
  39. 39.541 + 217 =
  40. 40.325 − 222 =

Answer key

  1. 91
  2. 918
  3. 566
  4. 215
  5. 577
  6. 467
  7. 359
  8. 180
  9. 202
  10. 244
  11. 313
  12. 801
  13. 142
  14. 943
  15. 731
  16. 264
  17. 20
  18. 269
  19. 201
  20. 868
  21. 456
  22. 52
  23. 300
  24. 396
  25. 586
  26. 705
  27. 51
  28. 233
  29. 731
  30. 134
  31. 443
  32. 319
  33. 994
  34. 300
  35. 1
  36. 604
  37. 925
  38. 127
  39. 758
  40. 103

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