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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 661 · 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. 1.5/6 − 3/4 =
  2. 2.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  3. 3.A bottle has 7/10 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.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? =
  5. 5.5/6 − 3/5 =
  6. 6.Aarav has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 2/3 litre of juice. Ishaan drinks 3/10 litre. How much juice is left (in litres)? =
  8. 8.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 1/2 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  10. 10.2/3 − 1/2 =
  11. 11.A bottle has 5/8 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  12. 12.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 5/6 litre of juice. Meera drinks 4/9 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 1/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.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? =
  16. 16.2/3 − 2/9 =
  17. 17.7/9 − 1/2 =
  18. 18.8/9 − 1/6 =
  19. 19.6/7 − 3/4 =
  20. 20.1/3 − 2/9 =
  21. 21.A bottle has 5/6 litre of juice. Vihaan drinks 2/5 litre. How much juice is left (in litres)? =
  22. 22.9/10 − 1/5 =
  23. 23.2/3 − 3/8 =
  24. 24.Rohan has a ribbon 7/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  25. 25.2/3 − 1/10 =
  26. 26.1/2 − 1/8 =
  27. 27.3/4 − 1/7 =
  28. 28.3/5 − 1/6 =
  29. 29.5/6 − 1/8 =
  30. 30.1/3 − 1/7 =
  31. 31.5/6 − 2/5 =
  32. 32.1/2 − 4/9 =
  33. 33.3/5 − 1/4 =
  34. 34.7/10 − 2/3 =
  35. 35.Aarav has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  36. 36.2/3 − 5/8 =
  37. 37.7/10 − 1/2 =
  38. 38.7/8 − 1/4 =
  39. 39.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  40. 40.2/5 − 3/10 =

Answer key

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

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