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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 785 · 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.A bottle has 5/8 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  2. 2.9/10 − 1/4 =
  3. 3.A bottle has 9/10 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  4. 4.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  5. 5.1/2 − 1/8 =
  6. 6.3/4 − 1/6 =
  7. 7.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  8. 8.Diya has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  9. 9.9/10 − 1/5 =
  10. 10.5/6 − 1/5 =
  11. 11.3/4 − 3/8 =
  12. 12.9/10 − 4/5 =
  13. 13.A bottle has 5/7 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  14. 14.2/5 − 1/4 =
  15. 15.8/9 − 2/3 =
  16. 16.A bottle has 1/2 litre of juice. Aarav drinks 2/7 litre. How much juice is left (in litres)? =
  17. 17.1/3 − 1/9 =
  18. 18.5/6 − 5/9 =
  19. 19.A bottle has 8/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.2/3 − 1/6 =
  21. 21.1/2 − 1/7 =
  22. 22.Aarav has a ribbon 5/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  24. 24.7/9 − 2/3 =
  25. 25.6/7 − 2/3 =
  26. 26.2/5 − 1/3 =
  27. 27.1/3 − 2/7 =
  28. 28.Diya has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  29. 29.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? =
  30. 30.5/6 − 2/5 =
  31. 31.A bottle has 1/3 litre of juice. Anaya drinks 2/7 litre. How much juice is left (in litres)? =
  32. 32.7/9 − 1/3 =
  33. 33.9/10 − 1/2 =
  34. 34.A bottle has 4/5 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.Diya has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  36. 36.3/10 − 1/6 =
  37. 37.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 5/8 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  39. 39.1/2 − 2/9 =
  40. 40.A bottle has 3/4 litre of juice. Kabir drinks 3/7 litre. How much juice is left (in litres)? =

Answer key

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

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