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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 215 · 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. 1.4/7 − 1/2 =
  2. 2.1/2 − 1/8 =
  3. 3.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  4. 4.Anaya has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  5. 5.A bottle has 5/6 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  6. 6.1/2 − 1/3 =
  7. 7.8/9 − 1/3 =
  8. 8.A bottle has 3/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  9. 9.5/7 − 1/4 =
  10. 10.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  11. 11.A bottle has 2/5 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  12. 12.5/8 − 1/2 =
  13. 13.A tank is 9/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.Diya has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  15. 15.Riya has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 3/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  18. 18.Kabir has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  21. 21.1/2 − 1/4 =
  22. 22.3/4 − 4/7 =
  23. 23.A bottle has 3/4 litre of juice. Ishaan drinks 7/10 litre. How much juice is left (in litres)? =
  24. 24.8/9 − 1/6 =
  25. 25.7/8 − 1/6 =
  26. 26.4/5 − 3/4 =
  27. 27.A bottle has 1/2 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 7/9 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  29. 29.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  30. 30.6/7 − 1/4 =
  31. 31.5/7 − 1/2 =
  32. 32.3/5 − 3/10 =
  33. 33.Rohan has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.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? =
  35. 35.4/5 − 2/3 =
  36. 36.3/4 − 3/8 =
  37. 37.7/9 − 1/6 =
  38. 38.Aarav has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 7/10 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 1/2 litre of juice. Aarav drinks 3/7 litre. How much juice is left (in litres)? =

Answer key

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

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