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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 952 · 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 tank is 3/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.3/4 − 3/5 =
  3. 3.Aarav has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  4. 4.1/2 − 1/5 =
  5. 5.3/5 − 1/10 =
  6. 6.A bottle has 2/5 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 3/5 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  8. 8.3/4 − 7/10 =
  9. 9.A bottle has 7/10 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  10. 10.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  11. 11.1/4 − 1/8 =
  12. 12.A bottle has 5/6 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.5/6 − 3/8 =
  14. 14.9/10 − 1/2 =
  15. 15.A bottle has 8/9 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  16. 16.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  17. 17.3/10 − 1/5 =
  18. 18.A bottle has 9/10 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  19. 19.7/10 − 1/5 =
  20. 20.A bottle has 2/5 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  21. 21.1/6 − 1/8 =
  22. 22.6/7 − 1/4 =
  23. 23.2/3 − 3/7 =
  24. 24.A bottle has 3/4 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.1/2 − 1/9 =
  26. 26.A tank is 1/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  27. 27.7/9 − 1/3 =
  28. 28.3/4 − 1/5 =
  29. 29.Arjun has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 2/3 litre of juice. Rohan drinks 5/8 litre. How much juice is left (in litres)? =
  31. 31.3/4 − 1/6 =
  32. 32.3/5 − 1/6 =
  33. 33.A bottle has 2/3 litre of juice. Meera drinks 5/9 litre. How much juice is left (in litres)? =
  34. 34.5/8 − 1/4 =
  35. 35.A bottle has 3/4 litre of juice. Sara drinks 1/8 litre. How much juice is left (in litres)? =
  36. 36.1/2 − 2/9 =
  37. 37.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? =
  38. 38.3/4 − 5/8 =
  39. 39.A bottle has 1/6 litre of juice. Vihaan drinks 1/9 litre. How much juice is left (in litres)? =
  40. 40.5/7 − 2/3 =

Answer key

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

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