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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 421 · 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. 1.1/2 − 2/7 =
  2. 2.Riya has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  3. 3.2/5 − 3/10 =
  4. 4.1/4 − 1/10 =
  5. 5.2/3 − 2/9 =
  6. 6.7/10 − 2/3 =
  7. 7.Riya has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  8. 8.A bottle has 2/9 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  9. 9.7/8 − 5/6 =
  10. 10.8/9 − 2/3 =
  11. 11.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  12. 12.6/7 − 1/3 =
  13. 13.7/10 − 3/5 =
  14. 14.A bottle has 3/4 litre of juice. Riya drinks 2/7 litre. How much juice is left (in litres)? =
  15. 15.5/8 − 1/4 =
  16. 16.A bottle has 5/6 litre of juice. Arjun drinks 5/9 litre. How much juice is left (in litres)? =
  17. 17.4/9 − 1/3 =
  18. 18.Meera has a ribbon 5/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  19. 19.1/2 − 4/9 =
  20. 20.A bottle has 7/9 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  21. 21.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  22. 22.Sara has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  23. 23.2/3 − 1/5 =
  24. 24.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  25. 25.5/7 − 1/3 =
  26. 26.A bottle has 2/3 litre of juice. Rohan drinks 1/9 litre. How much juice is left (in litres)? =
  27. 27.Arjun has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 6/7 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  29. 29.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? =
  30. 30.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.1/3 − 3/10 =
  32. 32.Diya has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 7/10 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 9/10 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 2/3 litre of juice. Diya drinks 3/5 litre. How much juice is left (in litres)? =
  36. 36.Arjun has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 5/7 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  38. 38.2/5 − 1/3 =
  39. 39.1/2 − 1/7 =
  40. 40.5/6 − 1/5 =

Answer key

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

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