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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 503 · 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 9/10 litre of juice. Anaya drinks 2/5 litre. How much juice is left (in litres)? =
  2. 2.1/3 − 2/7 =
  3. 3.A bottle has 2/5 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  4. 4.3/7 − 1/4 =
  5. 5.1/6 − 1/9 =
  6. 6.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 1/2 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.7/9 − 1/6 =
  9. 9.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 7/8 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.5/6 − 2/5 =
  12. 12.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 5/8 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  14. 14.5/6 − 1/2 =
  15. 15.Vihaan has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  16. 16.3/8 − 1/3 =
  17. 17.A bottle has 3/4 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.A tank is 3/4 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  19. 19.A bottle has 6/7 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  20. 20.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 9/10 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  22. 22.6/7 − 3/4 =
  23. 23.3/4 − 3/8 =
  24. 24.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  25. 25.9/10 − 2/3 =
  26. 26.2/3 − 4/9 =
  27. 27.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  28. 28.1/2 − 1/5 =
  29. 29.A bottle has 3/4 litre of juice. Kabir drinks 4/7 litre. How much juice is left (in litres)? =
  30. 30.4/9 − 1/6 =
  31. 31.2/5 − 1/3 =
  32. 32.Diya has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  33. 33.5/7 − 2/3 =
  34. 34.A tank is 2/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  35. 35.3/4 − 3/5 =
  36. 36.A bottle has 1/3 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  37. 37.4/7 − 1/4 =
  38. 38.Meera has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 7/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  40. 40.Arjun has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =

Answer key

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

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