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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 565 · 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 tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 4/5 litre of juice. Kabir drinks 3/4 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 3/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.8/9 − 5/6 =
  5. 5.A bottle has 3/10 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 1/4 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  7. 7.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? =
  8. 8.A bottle has 8/9 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  9. 9.7/8 − 1/6 =
  10. 10.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  11. 11.Rohan has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  12. 12.3/7 − 1/4 =
  13. 13.4/5 − 1/10 =
  14. 14.3/4 − 1/10 =
  15. 15.A bottle has 5/6 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  16. 16.3/5 − 3/10 =
  17. 17.A bottle has 5/9 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.5/7 − 1/3 =
  19. 19.A bottle has 1/3 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  20. 20.Ishaan has a ribbon 4/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  21. 21.1/2 − 1/6 =
  22. 22.9/10 − 3/4 =
  23. 23.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  24. 24.Meera has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  25. 25.1/2 − 4/9 =
  26. 26.7/10 − 1/2 =
  27. 27.3/4 − 2/7 =
  28. 28.2/3 − 1/5 =
  29. 29.A bottle has 2/3 litre of juice. Kabir drinks 1/7 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 5/8 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  31. 31.1/5 − 1/10 =
  32. 32.5/6 − 4/9 =
  33. 33.3/4 − 5/8 =
  34. 34.5/6 − 1/2 =
  35. 35.1/3 − 1/5 =
  36. 36.3/4 − 1/8 =
  37. 37.Arjun has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  38. 38.7/9 − 1/2 =
  39. 39.5/6 − 1/3 =
  40. 40.A bottle has 2/7 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =

Answer key

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

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