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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 680 · 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. 1.5/6 − 2/3 =
  2. 2.1/6 − 1/9 =
  3. 3.1/5 − 1/6 =
  4. 4.3/4 − 7/10 =
  5. 5.A bottle has 8/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.5/6 − 1/5 =
  7. 7.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.5/9 − 1/2 =
  9. 9.3/7 − 1/4 =
  10. 10.1/2 − 2/9 =
  11. 11.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  12. 12.7/9 − 1/2 =
  13. 13.Aarav has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  14. 14.8/9 − 5/6 =
  15. 15.A bottle has 7/10 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.Arjun has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  17. 17.1/3 − 1/8 =
  18. 18.A bottle has 7/10 litre of juice. Anaya drinks 3/5 litre. How much juice is left (in litres)? =
  19. 19.2/3 − 4/9 =
  20. 20.2/3 − 3/5 =
  21. 21.Kabir has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 8/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.Arjun has a ribbon 1/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  24. 24.A bottle has 8/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 4/5 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  26. 26.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? =
  27. 27.7/10 − 1/5 =
  28. 28.A bottle has 5/6 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 2/3 litre of juice. Arjun drinks 2/7 litre. How much juice is left (in litres)? =
  30. 30.Riya has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  31. 31.3/4 − 3/7 =
  32. 32.5/6 − 7/10 =
  33. 33.8/9 − 1/3 =
  34. 34.2/3 − 1/4 =
  35. 35.7/10 − 2/5 =
  36. 36.1/2 − 2/7 =
  37. 37.Rohan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 1/2 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  39. 39.Aarav has a ribbon 5/6 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  40. 40.1/2 − 1/10 =

Answer key

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

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