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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 983 · 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 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.2/3 − 2/9 =
  3. 3.8/9 − 1/2 =
  4. 4.1/3 − 1/6 =
  5. 5.6/7 − 2/3 =
  6. 6.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 2/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.Diya has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  9. 9.Rohan has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 7/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  11. 11.A bottle has 4/5 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  12. 12.5/8 − 1/3 =
  13. 13.A bottle has 1/5 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 3/4 litre of juice. Kabir drinks 2/7 litre. How much juice is left (in litres)? =
  15. 15.5/6 − 4/5 =
  16. 16.A bottle has 8/9 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.5/9 − 1/6 =
  18. 18.Meera has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 1/8 =
  20. 20.2/3 − 5/9 =
  21. 21.1/2 − 1/6 =
  22. 22.A bottle has 6/7 litre of juice. Arjun drinks 3/4 litre. How much juice is left (in litres)? =
  23. 23.3/8 − 1/6 =
  24. 24.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 4/7 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.3/10 − 1/6 =
  27. 27.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  28. 28.2/3 − 3/7 =
  29. 29.A bottle has 2/3 litre of juice. Ishaan drinks 2/5 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 3/4 litre of juice. Riya drinks 2/5 litre. How much juice is left (in litres)? =
  31. 31.A bottle has 9/10 litre of juice. Aarav drinks 4/5 litre. How much juice is left (in litres)? =
  32. 32.6/7 − 3/4 =
  33. 33.A bottle has 4/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  34. 34.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  35. 35.Kabir has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  36. 36.Tara has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  37. 37.3/5 − 1/4 =
  38. 38.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  39. 39.3/10 − 1/4 =
  40. 40.Rohan has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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