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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 846 · 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. 1.723 + 260 =
  2. 2.? − 229 = 66
  3. 3.A train has 727 people in the front coaches and 250 people in the back coaches. How many people are on the train?
  4. 4.676 − ? = 110
  5. 5.810 − 229 =
  6. 6.A school has 333 children. 216 of them are girls. How many boys are there?
  7. 7.907 − 801 =
  8. 8.872 − 215 =
  9. 9.? − 219 = 625
  10. 10.391 + 276 =
  11. 11.402 + ? = 667
  12. 12.138 + ? = 983
  13. 13.A school has 959 children. 930 of them are girls. How many boys are there?
  14. 14.341 + 642 =
  15. 15.? + 106 = 247
  16. 16.812 − ? = 71
  17. 17.732 − 496 =
  18. 18.486 + 428 =
  19. 19.? − 133 = 828
  20. 20.? + 191 = 522
  21. 21.A school has 310 children. 267 of them are girls. How many boys are there?
  22. 22.107 + 568 =
  23. 23.A train has 874 people in the front coaches and 110 people in the back coaches. How many people are on the train?
  24. 24.570 − 143 =
  25. 25.A train has 552 people in the front coaches and 142 people in the back coaches. How many people are on the train?
  26. 26.? + 298 = 777
  27. 27.648 − 497 =
  28. 28.537 + 253 =
  29. 29.A school has 945 children. 194 of them are girls. How many boys are there?
  30. 30.211 + 214 =
  31. 31.? + 653 = 783
  32. 32.646 + 218 =
  33. 33.A school has 352 children. 333 of them are girls. How many boys are there?
  34. 34.551 + 337 =
  35. 35.A train has 719 people in the front coaches and 121 people in the back coaches. How many people are on the train?
  36. 36.A school has 958 children. 856 of them are girls. How many boys are there?
  37. 37.A train has 298 people in the front coaches and 450 people in the back coaches. How many people are on the train?
  38. 38.815 − 168 =
  39. 39.612 + ? = 762
  40. 40.256 + 289 =

Answer key

  1. 983
  2. 295
  3. 977
  4. 566
  5. 581
  6. 117
  7. 106
  8. 657
  9. 844
  10. 667
  11. 265
  12. 845
  13. 29
  14. 983
  15. 141
  16. 741
  17. 236
  18. 914
  19. 961
  20. 331
  21. 43
  22. 675
  23. 984
  24. 427
  25. 694
  26. 479
  27. 151
  28. 790
  29. 751
  30. 425
  31. 130
  32. 864
  33. 19
  34. 888
  35. 840
  36. 102
  37. 748
  38. 647
  39. 150
  40. 545

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