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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 159 · 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. 1.3/4 − 3/5 =
  2. 2.Arjun has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 5/6 litre of juice. Tara drinks 5/8 litre. How much juice is left (in litres)? =
  4. 4.1/2 − 1/5 =
  5. 5.1/4 − 1/8 =
  6. 6.4/5 − 2/3 =
  7. 7.7/10 − 2/3 =
  8. 8.9/10 − 1/3 =
  9. 9.A tank is 9/10 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  10. 10.2/5 − 1/3 =
  11. 11.3/4 − 1/5 =
  12. 12.3/4 − 5/7 =
  13. 13.3/5 − 1/4 =
  14. 14.3/4 − 1/7 =
  15. 15.5/9 − 1/6 =
  16. 16.5/6 − 3/4 =
  17. 17.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  18. 18.5/6 − 2/5 =
  19. 19.A bottle has 1/3 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  20. 20.4/5 − 1/4 =
  21. 21.5/6 − 5/9 =
  22. 22.A bottle has 4/5 litre of juice. Diya drinks 7/10 litre. How much juice is left (in litres)? =
  23. 23.Rohan has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  24. 24.6/7 − 2/3 =
  25. 25.3/4 − 4/7 =
  26. 26.5/6 − 4/5 =
  27. 27.Diya has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  28. 28.Diya has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  29. 29.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? =
  30. 30.1/4 − 1/7 =
  31. 31.Arjun has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  32. 32.8/9 − 1/2 =
  33. 33.5/6 − 3/5 =
  34. 34.3/7 − 1/3 =
  35. 35.Diya has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  36. 36.1/2 − 4/9 =
  37. 37.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 5/6 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  39. 39.1/5 − 1/10 =
  40. 40.A tank is 2/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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