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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 114 · 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 461 children. 179 of them are girls. How many boys are there?
  2. 2.745 + 245 =
  3. 3.484 + ? = 735
  4. 4.320 + ? = 722
  5. 5.? + 648 = 902
  6. 6.? + 503 = 816
  7. 7.? − 846 = 15
  8. 8.654 + 215 =
  9. 9.294 − 199 =
  10. 10.854 + 134 =
  11. 11.289 + 505 =
  12. 12.? + 470 = 839
  13. 13.? + 476 = 597
  14. 14.378 + 191 =
  15. 15.A school has 474 children. 370 of them are girls. How many boys are there?
  16. 16.599 + ? = 775
  17. 17.741 − 463 =
  18. 18.242 − 200 =
  19. 19.A train has 478 people in the front coaches and 511 people in the back coaches. How many people are on the train?
  20. 20.597 − 246 =
  21. 21.143 + 661 =
  22. 22.745 + 225 =
  23. 23.? + 767 = 915
  24. 24.359 + ? = 703
  25. 25.A train has 439 people in the front coaches and 174 people in the back coaches. How many people are on the train?
  26. 26.A train has 628 people in the front coaches and 272 people in the back coaches. How many people are on the train?
  27. 27.A school has 659 children. 359 of them are girls. How many boys are there?
  28. 28.A train has 261 people in the front coaches and 283 people in the back coaches. How many people are on the train?
  29. 29.845 + ? = 974
  30. 30.830 + 162 =
  31. 31.116 + 673 =
  32. 32.722 + 100 =
  33. 33.A train has 775 people in the front coaches and 193 people in the back coaches. How many people are on the train?
  34. 34.238 + 170 =
  35. 35.A train has 305 people in the front coaches and 134 people in the back coaches. How many people are on the train?
  36. 36.? − 836 = 31
  37. 37.A train has 725 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  38. 38.911 − 328 =
  39. 39.305 − 238 =
  40. 40.411 − 301 =

Answer key

  1. 282
  2. 990
  3. 251
  4. 402
  5. 254
  6. 313
  7. 861
  8. 869
  9. 95
  10. 988
  11. 794
  12. 369
  13. 121
  14. 569
  15. 104
  16. 176
  17. 278
  18. 42
  19. 989
  20. 351
  21. 804
  22. 970
  23. 148
  24. 344
  25. 613
  26. 900
  27. 300
  28. 544
  29. 129
  30. 992
  31. 789
  32. 822
  33. 968
  34. 408
  35. 439
  36. 867
  37. 881
  38. 583
  39. 67
  40. 110

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