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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 6 · 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. 1.3/4 − 3/8 =
  2. 2.Diya has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  3. 3.2/5 − 3/10 =
  4. 4.A bottle has 3/4 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  5. 5.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  6. 6.Riya has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  7. 7.6/7 − 1/3 =
  8. 8.A tank is 5/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  9. 9.3/4 − 1/7 =
  10. 10.1/3 − 1/9 =
  11. 11.Aarav has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  12. 12.2/3 − 4/7 =
  13. 13.9/10 − 4/5 =
  14. 14.A bottle has 9/10 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.2/3 − 2/5 =
  16. 16.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  17. 17.1/4 − 1/7 =
  18. 18.7/9 − 1/2 =
  19. 19.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  20. 20.4/5 − 1/6 =
  21. 21.Vihaan has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 7/8 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 1/8 =
  24. 24.Arjun has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  25. 25.Meera has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  26. 26.A bottle has 1/2 litre of juice. Kabir drinks 2/7 litre. How much juice is left (in litres)? =
  27. 27.1/5 − 1/10 =
  28. 28.5/8 − 1/3 =
  29. 29.9/10 − 1/5 =
  30. 30.5/7 − 1/4 =
  31. 31.2/3 − 5/9 =
  32. 32.1/2 − 2/9 =
  33. 33.A bottle has 1/3 litre of juice. Rohan drinks 3/10 litre. How much juice is left (in litres)? =
  34. 34.5/8 − 1/2 =
  35. 35.9/10 − 2/5 =
  36. 36.Anaya has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  37. 37.Kabir has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  38. 38.1/2 − 1/5 =
  39. 39.A bottle has 7/10 litre of juice. Tara drinks 2/5 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 4/5 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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