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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 66 · 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. 1.4/5 − 1/10 =
  2. 2.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? =
  3. 3.5/6 − 1/4 =
  4. 4.5/6 − 3/5 =
  5. 5.Tara has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 1/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 5/8 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  8. 8.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  9. 9.2/3 − 4/7 =
  10. 10.1/4 − 1/7 =
  11. 11.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 5/6 litre of juice. Riya drinks 5/8 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 8/9 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  14. 14.1/2 − 1/8 =
  15. 15.2/3 − 1/4 =
  16. 16.1/5 − 1/10 =
  17. 17.A bottle has 3/5 litre of juice. Ishaan drinks 1/10 litre. How much juice is left (in litres)? =
  18. 18.2/3 − 2/9 =
  19. 19.7/10 − 1/4 =
  20. 20.2/3 − 4/9 =
  21. 21.3/5 − 1/10 =
  22. 22.A bottle has 3/5 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  23. 23.4/9 − 1/6 =
  24. 24.7/8 − 1/3 =
  25. 25.Vihaan has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 2/3 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  28. 28.1/2 − 3/10 =
  29. 29.A bottle has 2/3 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 3/4 litre of juice. Vihaan drinks 3/8 litre. How much juice is left (in litres)? =
  31. 31.7/10 − 1/5 =
  32. 32.3/4 − 2/3 =
  33. 33.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  34. 34.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 4/7 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 5/8 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  37. 37.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.A tank is 3/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  39. 39.8/9 − 2/3 =
  40. 40.A bottle has 8/9 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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