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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 97 · 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 695 people in the front coaches and 258 people in the back coaches. How many people are on the train?
  2. 2.A train has 447 people in the front coaches and 316 people in the back coaches. How many people are on the train?
  3. 3.954 − ? = 625
  4. 4.? − 100 = 203
  5. 5.561 − 368 =
  6. 6.A train has 797 people in the front coaches and 102 people in the back coaches. How many people are on the train?
  7. 7.702 − 435 =
  8. 8.521 − 110 =
  9. 9.666 − 142 =
  10. 10.186 + 300 =
  11. 11.177 + 321 =
  12. 12.A train has 457 people in the front coaches and 360 people in the back coaches. How many people are on the train?
  13. 13.A school has 519 children. 406 of them are girls. How many boys are there?
  14. 14.A school has 727 children. 700 of them are girls. How many boys are there?
  15. 15.444 − 375 =
  16. 16.? + 577 = 916
  17. 17.416 − 377 =
  18. 18.371 − 101 =
  19. 19.? + 190 = 836
  20. 20.296 − 169 =
  21. 21.A school has 291 children. 205 of them are girls. How many boys are there?
  22. 22.A train has 322 people in the front coaches and 145 people in the back coaches. How many people are on the train?
  23. 23.301 − ? = 176
  24. 24.A school has 625 children. 134 of them are girls. How many boys are there?
  25. 25.744 + 123 =
  26. 26.A train has 881 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  27. 27.182 + ? = 679
  28. 28.A train has 810 people in the front coaches and 157 people in the back coaches. How many people are on the train?
  29. 29.? − 921 = 6
  30. 30.A school has 215 children. 130 of them are girls. How many boys are there?
  31. 31.A school has 566 children. 473 of them are girls. How many boys are there?
  32. 32.A school has 661 children. 631 of them are girls. How many boys are there?
  33. 33.A school has 305 children. 213 of them are girls. How many boys are there?
  34. 34.464 + ? = 674
  35. 35.A school has 621 children. 310 of them are girls. How many boys are there?
  36. 36.848 − 203 =
  37. 37.A train has 273 people in the front coaches and 599 people in the back coaches. How many people are on the train?
  38. 38.139 + 276 =
  39. 39.? − 273 = 183
  40. 40.794 − 145 =

Answer key

  1. 953
  2. 763
  3. 329
  4. 303
  5. 193
  6. 899
  7. 267
  8. 411
  9. 524
  10. 486
  11. 498
  12. 817
  13. 113
  14. 27
  15. 69
  16. 339
  17. 39
  18. 270
  19. 646
  20. 127
  21. 86
  22. 467
  23. 125
  24. 491
  25. 867
  26. 986
  27. 497
  28. 967
  29. 927
  30. 85
  31. 93
  32. 30
  33. 92
  34. 210
  35. 311
  36. 645
  37. 872
  38. 415
  39. 456
  40. 649

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