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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 818 · 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 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 3/5 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  3. 3.4/9 − 1/3 =
  4. 4.3/4 − 7/10 =
  5. 5.3/4 − 4/7 =
  6. 6.3/4 − 5/7 =
  7. 7.2/5 − 3/10 =
  8. 8.6/7 − 1/4 =
  9. 9.5/9 − 1/3 =
  10. 10.3/10 − 1/5 =
  11. 11.1/3 − 1/8 =
  12. 12.A bottle has 7/8 litre of juice. Anaya drinks 5/6 litre. How much juice is left (in litres)? =
  13. 13.3/4 − 1/2 =
  14. 14.4/9 − 1/6 =
  15. 15.A bottle has 5/6 litre of juice. Tara drinks 3/4 litre. How much juice is left (in litres)? =
  16. 16.3/10 − 1/4 =
  17. 17.A bottle has 5/6 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  18. 18.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  19. 19.A bottle has 1/2 litre of juice. Meera drinks 2/5 litre. How much juice is left (in litres)? =
  20. 20.8/9 − 1/2 =
  21. 21.9/10 − 1/5 =
  22. 22.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.1/4 − 1/8 =
  24. 24.8/9 − 1/6 =
  25. 25.5/7 − 2/3 =
  26. 26.9/10 − 1/3 =
  27. 27.7/10 − 2/5 =
  28. 28.Diya has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  29. 29.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? =
  30. 30.A bottle has 7/8 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.Meera has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  32. 32.5/6 − 2/5 =
  33. 33.5/8 − 1/2 =
  34. 34.1/2 − 3/8 =
  35. 35.A bottle has 5/8 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.Anaya has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  37. 37.Arjun has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  38. 38.1/2 − 2/5 =
  39. 39.Meera has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  40. 40.Riya has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =

Answer key

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

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