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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 137 · 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. 1.7/10 − 1/2 =
  2. 2.A bottle has 2/3 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 4/5 litre of juice. Riya drinks 7/10 litre. How much juice is left (in litres)? =
  4. 4.2/3 − 1/6 =
  5. 5.5/6 − 1/8 =
  6. 6.A tank is 7/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  7. 7.2/3 − 4/7 =
  8. 8.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  9. 9.6/7 − 2/3 =
  10. 10.A bottle has 9/10 litre of juice. Rohan drinks 4/5 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 1/2 litre of juice. Rohan drinks 4/9 litre. How much juice is left (in litres)? =
  12. 12.Kabir has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  13. 13.Riya has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 8/9 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.8/9 − 1/3 =
  16. 16.8/9 − 5/6 =
  17. 17.A bottle has 5/6 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 2/5 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.1/2 − 1/9 =
  20. 20.4/9 − 1/3 =
  21. 21.4/5 − 1/3 =
  22. 22.5/9 − 1/2 =
  23. 23.2/3 − 5/8 =
  24. 24.A tank is 5/6 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  25. 25.Rohan has a ribbon 2/3 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  26. 26.5/7 − 1/2 =
  27. 27.A bottle has 2/5 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  28. 28.Riya has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  29. 29.Tara has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  30. 30.7/8 − 5/6 =
  31. 31.5/6 − 3/5 =
  32. 32.3/4 − 2/5 =
  33. 33.3/10 − 1/5 =
  34. 34.1/2 − 2/9 =
  35. 35.1/3 − 1/10 =
  36. 36.A bottle has 7/10 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  37. 37.4/7 − 1/2 =
  38. 38.Rohan has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  39. 39.5/6 − 5/9 =
  40. 40.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? =

Answer key

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

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