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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 10 · 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. 1.7/8 − 1/4 =
  2. 2.7/10 − 1/3 =
  3. 3.8/9 − 1/2 =
  4. 4.1/2 − 2/9 =
  5. 5.Aarav has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  6. 6.3/4 − 2/5 =
  7. 7.4/5 − 1/2 =
  8. 8.Arjun has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  9. 9.4/5 − 3/10 =
  10. 10.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  11. 11.5/6 − 4/5 =
  12. 12.3/5 − 1/10 =
  13. 13.A bottle has 7/8 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  14. 14.2/3 − 4/9 =
  15. 15.2/9 − 1/6 =
  16. 16.1/4 − 1/7 =
  17. 17.4/9 − 1/6 =
  18. 18.A bottle has 5/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  19. 19.5/6 − 1/9 =
  20. 20.Tara has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  21. 21.2/3 − 1/8 =
  22. 22.A bottle has 3/5 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  23. 23.1/2 − 1/9 =
  24. 24.1/2 − 3/8 =
  25. 25.7/9 − 1/6 =
  26. 26.2/5 − 1/3 =
  27. 27.A bottle has 1/3 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  28. 28.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  29. 29.1/2 − 2/7 =
  30. 30.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  31. 31.A tank is 2/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 4/5 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.Aarav has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  34. 34.3/4 − 2/3 =
  35. 35.5/7 − 1/4 =
  36. 36.1/5 − 1/6 =
  37. 37.A bottle has 2/5 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.7/9 − 2/3 =
  39. 39.2/3 − 2/7 =
  40. 40.A tank is 2/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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