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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 588 · 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.Rohan has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.Rohan has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 2/3 litre of juice. Meera drinks 2/9 litre. How much juice is left (in litres)? =
  4. 4.9/10 − 1/5 =
  5. 5.A bottle has 9/10 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.4/7 − 1/2 =
  7. 7.1/3 − 1/4 =
  8. 8.A bottle has 9/10 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  9. 9.7/8 − 1/2 =
  10. 10.3/4 − 1/7 =
  11. 11.4/5 − 1/4 =
  12. 12.1/6 − 1/8 =
  13. 13.3/4 − 3/10 =
  14. 14.A bottle has 3/4 litre of juice. Aarav drinks 4/7 litre. How much juice is left (in litres)? =
  15. 15.A bottle has 4/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.2/3 − 1/2 =
  17. 17.A tank is 5/6 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  18. 18.Riya has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  19. 19.3/5 − 1/6 =
  20. 20.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? =
  21. 21.3/4 − 2/7 =
  22. 22.3/4 − 2/3 =
  23. 23.A bottle has 1/4 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  24. 24.2/3 − 4/9 =
  25. 25.5/7 − 1/2 =
  26. 26.3/5 − 1/2 =
  27. 27.4/5 − 1/6 =
  28. 28.1/3 − 2/7 =
  29. 29.9/10 − 4/5 =
  30. 30.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 2/3 litre of juice. Ishaan drinks 2/7 litre. How much juice is left (in litres)? =
  32. 32.6/7 − 2/3 =
  33. 33.1/2 − 1/10 =
  34. 34.Kabir has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  35. 35.3/7 − 1/4 =
  36. 36.1/2 − 2/9 =
  37. 37.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  38. 38.1/2 − 2/7 =
  39. 39.A bottle has 3/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.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? =

Answer key

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

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