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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 716 · 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. 1.3/8 − 1/6 =
  2. 2.Sara has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  3. 3.8/9 − 2/3 =
  4. 4.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  5. 5.Sara has a ribbon 5/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  6. 6.Aarav has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  7. 7.1/2 − 1/9 =
  8. 8.A bottle has 3/8 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  9. 9.5/9 − 1/6 =
  10. 10.8/9 − 1/6 =
  11. 11.5/8 − 1/3 =
  12. 12.8/9 − 1/2 =
  13. 13.A bottle has 2/3 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 2/9 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.3/5 − 1/10 =
  16. 16.A bottle has 3/8 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  17. 17.Meera has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  18. 18.9/10 − 4/5 =
  19. 19.A bottle has 2/3 litre of juice. Ishaan drinks 4/7 litre. How much juice is left (in litres)? =
  20. 20.Kabir has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  21. 21.A bottle has 5/6 litre of juice. Arjun drinks 4/9 litre. How much juice is left (in litres)? =
  22. 22.4/7 − 1/4 =
  23. 23.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 1/2 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  26. 26.Aarav has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  27. 27.A bottle has 1/2 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =
  28. 28.4/9 − 1/6 =
  29. 29.A bottle has 3/10 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  30. 30.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? =
  31. 31.3/4 − 2/7 =
  32. 32.A bottle has 4/5 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  33. 33.3/4 − 1/5 =
  34. 34.3/5 − 1/3 =
  35. 35.Arjun has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  37. 37.7/9 − 1/6 =
  38. 38.7/10 − 1/5 =
  39. 39.3/7 − 1/3 =
  40. 40.6/7 − 1/3 =

Answer key

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

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