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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 425 · 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 train has 596 people in the front coaches and 392 people in the back coaches. How many people are on the train?
  2. 2.? + 184 = 697
  3. 3.847 + ? = 996
  4. 4.A train has 659 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  5. 5.A train has 429 people in the front coaches and 126 people in the back coaches. How many people are on the train?
  6. 6.256 + 515 =
  7. 7.737 − 202 =
  8. 8.A train has 867 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  9. 9.891 − 634 =
  10. 10.890 + 109 =
  11. 11.A train has 849 people in the front coaches and 146 people in the back coaches. How many people are on the train?
  12. 12.989 − ? = 650
  13. 13.A school has 346 children. 309 of them are girls. How many boys are there?
  14. 14.A train has 332 people in the front coaches and 397 people in the back coaches. How many people are on the train?
  15. 15.656 − 146 =
  16. 16.511 − 128 =
  17. 17.A train has 671 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  18. 18.801 − 115 =
  19. 19.824 + 155 =
  20. 20.486 + ? = 784
  21. 21.? + 433 = 737
  22. 22.229 − ? = 48
  23. 23.A school has 681 children. 285 of them are girls. How many boys are there?
  24. 24.? + 800 = 924
  25. 25.332 + ? = 495
  26. 26.A train has 220 people in the front coaches and 444 people in the back coaches. How many people are on the train?
  27. 27.A school has 400 children. 148 of them are girls. How many boys are there?
  28. 28.A train has 493 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  29. 29.A train has 175 people in the front coaches and 611 people in the back coaches. How many people are on the train?
  30. 30.A train has 257 people in the front coaches and 370 people in the back coaches. How many people are on the train?
  31. 31.536 + 125 =
  32. 32.? + 112 = 803
  33. 33.411 − 274 =
  34. 34.188 + 241 =
  35. 35.A school has 416 children. 165 of them are girls. How many boys are there?
  36. 36.A train has 434 people in the front coaches and 468 people in the back coaches. How many people are on the train?
  37. 37.A train has 390 people in the front coaches and 429 people in the back coaches. How many people are on the train?
  38. 38.659 − 348 =
  39. 39.558 + 300 =
  40. 40.810 + 104 =

Answer key

  1. 988
  2. 513
  3. 149
  4. 774
  5. 555
  6. 771
  7. 535
  8. 976
  9. 257
  10. 999
  11. 995
  12. 339
  13. 37
  14. 729
  15. 510
  16. 383
  17. 782
  18. 686
  19. 979
  20. 298
  21. 304
  22. 181
  23. 396
  24. 124
  25. 163
  26. 664
  27. 252
  28. 595
  29. 786
  30. 627
  31. 661
  32. 691
  33. 137
  34. 429
  35. 251
  36. 902
  37. 819
  38. 311
  39. 858
  40. 914

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