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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 446 · 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.Tara has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  2. 2.A bottle has 7/9 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  3. 3.8/9 − 2/3 =
  4. 4.5/8 − 1/3 =
  5. 5.1/3 − 1/5 =
  6. 6.3/4 − 1/5 =
  7. 7.Rohan has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  8. 8.8/9 − 5/6 =
  9. 9.Anaya has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  10. 10.2/5 − 1/10 =
  11. 11.9/10 − 3/4 =
  12. 12.4/5 − 1/3 =
  13. 13.A tank is 2/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  14. 14.3/4 − 3/10 =
  15. 15.Kabir has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  16. 16.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.A tank is 9/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  18. 18.Meera has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 7/10 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  21. 21.Riya has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  22. 22.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  23. 23.A bottle has 7/10 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  24. 24.3/4 − 2/3 =
  25. 25.Arjun has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  26. 26.A bottle has 8/9 litre of juice. Aarav drinks 5/6 litre. How much juice is left (in litres)? =
  27. 27.Meera has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 1/4 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  29. 29.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  31. 31.3/4 − 5/7 =
  32. 32.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  33. 33.1/3 − 1/8 =
  34. 34.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 9/10 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  36. 36.7/10 − 1/5 =
  37. 37.A bottle has 4/7 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 4/7 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.7/8 − 5/6 =
  40. 40.A bottle has 7/8 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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