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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 965 · 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.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.3/4 − 2/5 =
  3. 3.7/9 − 1/3 =
  4. 4.4/5 − 1/10 =
  5. 5.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  6. 6.1/5 − 1/10 =
  7. 7.Arjun has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  8. 8.5/6 − 1/9 =
  9. 9.2/5 − 3/10 =
  10. 10.2/3 − 1/7 =
  11. 11.A bottle has 3/8 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  12. 12.1/3 − 2/9 =
  13. 13.Meera has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 1/3 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  15. 15.Aarav has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  16. 16.Anaya has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  17. 17.Kabir has a ribbon 1/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 8/9 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.4/7 − 1/4 =
  20. 20.2/9 − 1/6 =
  21. 21.A tank is 3/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  22. 22.5/8 − 1/4 =
  23. 23.1/3 − 2/7 =
  24. 24.Arjun has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  25. 25.A bottle has 5/8 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.4/5 − 1/6 =
  27. 27.7/8 − 2/3 =
  28. 28.2/3 − 1/4 =
  29. 29.Ishaan has a ribbon 3/4 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  30. 30.8/9 − 5/6 =
  31. 31.5/7 − 1/4 =
  32. 32.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.5/9 − 1/6 =
  34. 34.1/4 − 1/8 =
  35. 35.3/4 − 1/3 =
  36. 36.5/7 − 1/2 =
  37. 37.Meera has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 7/8 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.4/5 − 2/3 =
  40. 40.Vihaan has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =

Answer key

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

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