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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 517 · 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. 1.5/8 − 1/6 =
  2. 2.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.A bottle has 2/5 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  4. 4.6/7 − 1/3 =
  5. 5.Diya has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  6. 6.Kabir has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  7. 7.5/9 − 1/2 =
  8. 8.3/5 − 1/2 =
  9. 9.1/2 − 1/10 =
  10. 10.Rohan has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  11. 11.2/3 − 4/7 =
  12. 12.5/6 − 2/5 =
  13. 13.2/3 − 1/2 =
  14. 14.A bottle has 5/6 litre of juice. Arjun drinks 7/10 litre. How much juice is left (in litres)? =
  15. 15.1/4 − 1/8 =
  16. 16.4/5 − 7/10 =
  17. 17.5/6 − 4/9 =
  18. 18.7/8 − 1/2 =
  19. 19.5/7 − 1/4 =
  20. 20.1/2 − 3/8 =
  21. 21.9/10 − 5/6 =
  22. 22.A bottle has 4/5 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.A tank is 7/8 full of water. Then water filling 5/6 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 1/6 of the tank is used. What fraction of the tank is full now? =
  25. 25.7/9 − 2/3 =
  26. 26.7/10 − 3/5 =
  27. 27.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  28. 28.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  29. 29.1/3 − 1/7 =
  30. 30.1/6 − 1/8 =
  31. 31.3/8 − 1/3 =
  32. 32.5/6 − 3/5 =
  33. 33.A bottle has 2/5 litre of juice. Ishaan drinks 1/10 litre. How much juice is left (in litres)? =
  34. 34.9/10 − 1/2 =
  35. 35.1/2 − 4/9 =
  36. 36.Meera has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  37. 37.5/8 − 1/4 =
  38. 38.3/10 − 1/4 =
  39. 39.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? =
  40. 40.A bottle has 4/5 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =

Answer key

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

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