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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 33 · 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. 1.5/7 − 1/4 =
  2. 2.9/10 − 3/5 =
  3. 3.1/6 − 1/9 =
  4. 4.3/4 − 2/7 =
  5. 5.A bottle has 1/2 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  6. 6.8/9 − 1/2 =
  7. 7.7/9 − 2/3 =
  8. 8.A bottle has 7/10 litre of juice. Tara drinks 2/5 litre. How much juice is left (in litres)? =
  9. 9.2/7 − 1/4 =
  10. 10.8/9 − 1/3 =
  11. 11.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  13. 13.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  14. 14.Arjun has a ribbon 5/6 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  15. 15.5/6 − 1/8 =
  16. 16.1/4 − 1/7 =
  17. 17.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  18. 18.2/3 − 1/8 =
  19. 19.A bottle has 9/10 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  20. 20.Riya has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  21. 21.2/3 − 5/9 =
  22. 22.3/4 − 5/8 =
  23. 23.A bottle has 9/10 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  24. 24.4/5 − 1/6 =
  25. 25.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? =
  26. 26.3/4 − 1/3 =
  27. 27.A bottle has 6/7 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 5/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.3/5 − 1/3 =
  30. 30.Diya has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  31. 31.4/5 − 3/10 =
  32. 32.1/3 − 1/9 =
  33. 33.4/9 − 1/6 =
  34. 34.A bottle has 3/8 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  35. 35.Rohan has a ribbon 5/6 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  36. 36.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? =
  37. 37.A bottle has 6/7 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  38. 38.5/6 − 2/5 =
  39. 39.2/3 − 3/5 =
  40. 40.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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