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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 619 · 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. 1.6/7 − 1/4 =
  2. 2.1/4 − 1/8 =
  3. 3.1/6 − 1/9 =
  4. 4.Anaya has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  5. 5.Tara has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  6. 6.1/2 − 3/7 =
  7. 7.9/10 − 1/5 =
  8. 8.1/2 − 1/5 =
  9. 9.1/4 − 1/10 =
  10. 10.A bottle has 1/4 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  11. 11.Sara has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.3/4 − 4/7 =
  14. 14.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  15. 15.8/9 − 1/6 =
  16. 16.1/3 − 2/7 =
  17. 17.3/4 − 2/3 =
  18. 18.A bottle has 5/7 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  19. 19.2/3 − 1/7 =
  20. 20.7/9 − 1/2 =
  21. 21.1/2 − 3/10 =
  22. 22.3/5 − 1/6 =
  23. 23.5/9 − 1/3 =
  24. 24.7/8 − 1/3 =
  25. 25.5/6 − 3/10 =
  26. 26.A bottle has 9/10 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  27. 27.5/8 − 1/4 =
  28. 28.3/10 − 1/5 =
  29. 29.Rohan has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 2/3 litre of juice. Anaya drinks 2/7 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 3/4 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  33. 33.Arjun has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 2/3 litre of juice. Meera drinks 2/9 litre. How much juice is left (in litres)? =
  35. 35.Riya has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 5/6 litre of juice. Anaya drinks 2/5 litre. How much juice is left (in litres)? =
  37. 37.4/5 − 7/10 =
  38. 38.A tank is 1/2 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  39. 39.2/3 − 4/7 =
  40. 40.Meera has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =

Answer key

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

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