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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 794 · 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 1/3 litre of juice. Riya drinks 2/9 litre. How much juice is left (in litres)? =
  2. 2.Meera has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.3/7 − 1/3 =
  5. 5.A tank is 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  6. 6.A bottle has 2/3 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  7. 7.9/10 − 1/5 =
  8. 8.5/8 − 1/2 =
  9. 9.2/5 − 1/6 =
  10. 10.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  11. 11.A bottle has 1/3 litre of juice. Anaya drinks 1/8 litre. How much juice is left (in litres)? =
  12. 12.Tara has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  13. 13.5/7 − 1/2 =
  14. 14.Kabir has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  15. 15.3/4 − 1/5 =
  16. 16.A bottle has 5/8 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  17. 17.7/9 − 1/2 =
  18. 18.9/10 − 4/5 =
  19. 19.1/2 − 3/10 =
  20. 20.1/2 − 1/9 =
  21. 21.Kabir has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  22. 22.2/3 − 1/10 =
  23. 23.A bottle has 7/10 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 6/7 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 4/5 litre of juice. Rohan drinks 3/10 litre. How much juice is left (in litres)? =
  26. 26.1/4 − 1/5 =
  27. 27.1/4 − 1/10 =
  28. 28.3/7 − 1/4 =
  29. 29.1/3 − 1/8 =
  30. 30.3/4 − 3/5 =
  31. 31.A bottle has 6/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  32. 32.3/5 − 1/2 =
  33. 33.A bottle has 7/9 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  34. 34.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  35. 35.2/3 − 1/2 =
  36. 36.1/2 − 2/9 =
  37. 37.Sara has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  38. 38.3/4 − 1/7 =
  39. 39.Diya has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  40. 40.5/8 − 1/6 =

Answer key

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

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