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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 539 · 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. 1.5/6 − 4/9 =
  2. 2.5/8 − 1/4 =
  3. 3.2/3 − 1/5 =
  4. 4.3/10 − 1/6 =
  5. 5.5/6 − 1/3 =
  6. 6.4/9 − 1/3 =
  7. 7.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  8. 8.Rohan has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  9. 9.Sara has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  11. 11.2/5 − 1/3 =
  12. 12.A bottle has 5/6 litre of juice. Tara drinks 1/5 litre. How much juice is left (in litres)? =
  13. 13.Aarav has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 8/9 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  15. 15.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  16. 16.7/10 − 3/5 =
  17. 17.Arjun has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  18. 18.5/9 − 1/6 =
  19. 19.3/5 − 1/4 =
  20. 20.1/3 − 1/8 =
  21. 21.3/4 − 1/6 =
  22. 22.Riya has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  23. 23.2/5 − 1/6 =
  24. 24.A bottle has 4/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.5/9 − 1/3 =
  26. 26.9/10 − 1/5 =
  27. 27.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  28. 28.6/7 − 1/4 =
  29. 29.7/8 − 1/6 =
  30. 30.Aarav has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  31. 31.9/10 − 3/4 =
  32. 32.5/8 − 1/3 =
  33. 33.4/5 − 2/3 =
  34. 34.7/10 − 1/6 =
  35. 35.3/4 − 3/7 =
  36. 36.A bottle has 2/3 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  37. 37.9/10 − 4/5 =
  38. 38.2/3 − 2/7 =
  39. 39.1/4 − 1/8 =
  40. 40.Rohan has a ribbon 3/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =

Answer key

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

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