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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 429 · 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.Arjun has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  2. 2.1/2 − 1/9 =
  3. 3.4/5 − 1/4 =
  4. 4.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  6. 6.Rohan has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  7. 7.1/2 − 1/5 =
  8. 8.A bottle has 7/8 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 4/5 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  10. 10.2/3 − 2/9 =
  11. 11.3/4 − 3/5 =
  12. 12.Diya has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  13. 13.1/3 − 1/7 =
  14. 14.2/3 − 1/7 =
  15. 15.1/5 − 1/10 =
  16. 16.2/3 − 4/9 =
  17. 17.7/9 − 1/3 =
  18. 18.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  19. 19.8/9 − 2/3 =
  20. 20.3/5 − 1/10 =
  21. 21.Tara has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  22. 22.Riya has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 8/9 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  24. 24.2/3 − 1/8 =
  25. 25.A bottle has 2/3 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  26. 26.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  27. 27.6/7 − 1/4 =
  28. 28.A bottle has 7/10 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.3/4 − 3/8 =
  30. 30.7/8 − 1/6 =
  31. 31.5/8 − 1/6 =
  32. 32.5/6 − 2/9 =
  33. 33.6/7 − 3/4 =
  34. 34.Rohan has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  35. 35.Anaya has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 1/2 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 7/8 litre of juice. Vihaan drinks 3/4 litre. How much juice is left (in litres)? =
  38. 38.7/8 − 1/3 =
  39. 39.5/8 − 1/2 =
  40. 40.A bottle has 4/7 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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