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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 332 · 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. 1.7/10 − 3/5 =
  2. 2.A bottle has 5/6 litre of juice. Ishaan drinks 2/9 litre. How much juice is left (in litres)? =
  3. 3.2/3 − 2/9 =
  4. 4.5/7 − 1/3 =
  5. 5.Meera has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  6. 6.Tara has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 7/10 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  8. 8.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  9. 9.1/2 − 3/7 =
  10. 10.7/8 − 1/3 =
  11. 11.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  12. 12.2/3 − 1/4 =
  13. 13.2/3 − 2/7 =
  14. 14.5/6 − 1/4 =
  15. 15.A bottle has 1/3 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  16. 16.1/2 − 1/4 =
  17. 17.Anaya has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.1/2 − 1/9 =
  19. 19.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 3/4 litre of juice. Arjun drinks 2/5 litre. How much juice is left (in litres)? =
  21. 21.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? =
  22. 22.8/9 − 2/3 =
  23. 23.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  25. 25.3/4 − 5/7 =
  26. 26.Aarav has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  27. 27.5/9 − 1/6 =
  28. 28.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  29. 29.2/3 − 1/7 =
  30. 30.A bottle has 3/5 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  32. 32.1/4 − 1/6 =
  33. 33.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? =
  34. 34.4/5 − 1/3 =
  35. 35.A bottle has 3/4 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.Diya has a ribbon 2/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  37. 37.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.3/8 − 1/6 =
  39. 39.Diya has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  40. 40.Diya has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =

Answer key

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

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