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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 692 · 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. 1.4/9 − 1/6 =
  2. 2.A bottle has 1/3 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  3. 3.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? =
  4. 4.3/7 − 1/4 =
  5. 5.Aarav has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.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? =
  7. 7.9/10 − 2/5 =
  8. 8.3/5 − 1/10 =
  9. 9.A bottle has 2/3 litre of juice. Aarav drinks 2/9 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 4/7 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.2/5 − 1/10 =
  12. 12.A bottle has 2/3 litre of juice. Kabir drinks 2/7 litre. How much juice is left (in litres)? =
  13. 13.5/7 − 1/2 =
  14. 14.A bottle has 3/5 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.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? =
  16. 16.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  17. 17.1/3 − 2/7 =
  18. 18.4/9 − 1/3 =
  19. 19.Arjun has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  20. 20.3/7 − 1/3 =
  21. 21.9/10 − 3/5 =
  22. 22.Diya has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  23. 23.1/2 − 1/4 =
  24. 24.Sara has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  25. 25.Arjun has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/3 − 3/7 =
  28. 28.A bottle has 7/10 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  29. 29.A tank is 7/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.A bottle has 5/7 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.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? =
  32. 32.A bottle has 8/9 litre of juice. Vihaan drinks 5/6 litre. How much juice is left (in litres)? =
  33. 33.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  34. 34.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 1/5 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  36. 36.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.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? =
  39. 39.2/3 − 1/4 =
  40. 40.A bottle has 3/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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