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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 580 · 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.A bottle has 3/4 litre of juice. Riya drinks 7/10 litre. How much juice is left (in litres)? =
  2. 2.Aarav has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 9/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  4. 4.1/4 − 1/8 =
  5. 5.1/3 − 1/8 =
  6. 6.7/8 − 1/2 =
  7. 7.5/7 − 1/4 =
  8. 8.3/4 − 7/10 =
  9. 9.1/3 − 1/9 =
  10. 10.3/5 − 3/10 =
  11. 11.5/7 − 2/3 =
  12. 12.1/2 − 2/7 =
  13. 13.Diya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  14. 14.1/4 − 1/5 =
  15. 15.7/8 − 1/3 =
  16. 16.A bottle has 4/9 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  17. 17.4/7 − 1/4 =
  18. 18.3/4 − 3/8 =
  19. 19.Meera has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  20. 20.Arjun has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  21. 21.5/6 − 4/5 =
  22. 22.A bottle has 7/9 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 2/3 litre of juice. Aarav drinks 2/7 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 2/3 litre of juice. Anaya drinks 3/5 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 3/5 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.Aarav has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  27. 27.Meera has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  28. 28.1/4 − 1/7 =
  29. 29.Rohan has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.Sara has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  32. 32.2/5 − 3/10 =
  33. 33.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  34. 34.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  35. 35.Ishaan has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  36. 36.3/4 − 1/7 =
  37. 37.1/3 − 2/7 =
  38. 38.4/7 − 1/3 =
  39. 39.A tank is 1/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  40. 40.7/8 − 2/3 =

Answer key

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

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