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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 457 · 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 bottle has 5/8 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  2. 2.A bottle has 1/2 litre of juice. Meera drinks 4/9 litre. How much juice is left (in litres)? =
  3. 3.3/4 − 3/5 =
  4. 4.Meera has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  5. 5.5/6 − 4/9 =
  6. 6.3/7 − 1/4 =
  7. 7.5/9 − 1/2 =
  8. 8.Vihaan has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  9. 9.Diya has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  10. 10.Vihaan has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  11. 11.2/3 − 1/5 =
  12. 12.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  13. 13.7/8 − 3/4 =
  14. 14.A bottle has 3/5 litre of juice. Vihaan drinks 3/10 litre. How much juice is left (in litres)? =
  15. 15.Kabir has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  16. 16.6/7 − 1/4 =
  17. 17.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  18. 18.7/10 − 2/5 =
  19. 19.A bottle has 5/6 litre of juice. Arjun drinks 3/4 litre. How much juice is left (in litres)? =
  20. 20.4/5 − 1/3 =
  21. 21.Arjun has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  22. 22.7/10 − 1/4 =
  23. 23.A bottle has 4/7 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 1/6 =
  25. 25.3/4 − 5/7 =
  26. 26.1/4 − 1/5 =
  27. 27.Vihaan has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 9/10 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  29. 29.1/2 − 2/5 =
  30. 30.5/9 − 1/3 =
  31. 31.3/4 − 1/6 =
  32. 32.3/4 − 1/3 =
  33. 33.Arjun has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  34. 34.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  35. 35.2/3 − 3/7 =
  36. 36.Tara has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  37. 37.7/8 − 1/6 =
  38. 38.2/3 − 4/9 =
  39. 39.Anaya has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  40. 40.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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