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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 817 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.Rohan has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  2. 2.2/3 − 1/9 =
  3. 3.7/9 − 1/3 =
  4. 4.3/8 − 1/6 =
  5. 5.7/10 − 1/5 =
  6. 6.4/5 − 7/10 =
  7. 7.5/9 − 1/2 =
  8. 8.1/2 − 3/7 =
  9. 9.2/3 − 1/8 =
  10. 10.2/3 − 3/5 =
  11. 11.2/5 − 1/10 =
  12. 12.A bottle has 5/6 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  13. 13.3/7 − 1/3 =
  14. 14.A bottle has 2/3 litre of juice. Vihaan drinks 2/5 litre. How much juice is left (in litres)? =
  15. 15.Kabir has a ribbon 5/6 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  16. 16.5/8 − 1/3 =
  17. 17.2/3 − 1/7 =
  18. 18.Ishaan has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  19. 19.2/5 − 1/4 =
  20. 20.6/7 − 1/4 =
  21. 21.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  22. 22.Kabir has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 5/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  24. 24.2/3 − 1/10 =
  25. 25.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.Ishaan has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  27. 27.1/2 − 2/7 =
  28. 28.1/3 − 1/9 =
  29. 29.9/10 − 2/5 =
  30. 30.6/7 − 1/2 =
  31. 31.4/9 − 1/3 =
  32. 32.1/2 − 3/10 =
  33. 33.Kabir has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  34. 34.1/3 − 1/4 =
  35. 35.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  36. 36.7/8 − 1/3 =
  37. 37.1/2 − 1/10 =
  38. 38.1/3 − 3/10 =
  39. 39.7/8 − 5/6 =
  40. 40.5/6 − 7/10 =

Answer key

  1. 1/30
  2. 5/9
  3. 4/9
  4. 5/24
  5. 1/2
  6. 1/10
  7. 1/18
  8. 1/14
  9. 13/24
  10. 1/15
  11. 3/10
  12. 13/18
  13. 2/21
  14. 4/15
  15. 1/12
  16. 7/24
  17. 11/21
  18. 13/24
  19. 3/20
  20. 17/28
  21. 2/5
  22. 1/30
  23. 13/18
  24. 17/30
  25. 5/9
  26. 7/18
  27. 3/14
  28. 2/9
  29. 1/2
  30. 5/14
  31. 1/9
  32. 1/5
  33. 1/20
  34. 1/12
  35. 1/28
  36. 13/24
  37. 2/5
  38. 1/30
  39. 1/24
  40. 2/15

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