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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 205 · 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. 1.7/10 − 1/2 =
  2. 2.7/8 − 1/6 =
  3. 3.3/4 − 3/5 =
  4. 4.9/10 − 1/6 =
  5. 5.2/3 − 1/6 =
  6. 6.6/7 − 1/2 =
  7. 7.A bottle has 1/3 litre of juice. Arjun drinks 1/9 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 5/6 litre of juice. Kabir drinks 5/8 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 1/6 litre of juice. Sara drinks 1/8 litre. How much juice is left (in litres)? =
  10. 10.3/4 − 2/7 =
  11. 11.7/8 − 1/3 =
  12. 12.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  13. 13.8/9 − 1/6 =
  14. 14.4/7 − 1/4 =
  15. 15.3/4 − 5/7 =
  16. 16.A tank is 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.Meera has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  18. 18.1/2 − 3/7 =
  19. 19.5/7 − 1/2 =
  20. 20.A bottle has 3/10 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  21. 21.A tank is 7/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  22. 22.2/3 − 3/7 =
  23. 23.4/9 − 1/6 =
  24. 24.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  25. 25.3/10 − 1/6 =
  26. 26.2/5 − 1/4 =
  27. 27.Rohan has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  28. 28.Ishaan has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  29. 29.Aarav has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 7/9 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 5/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  33. 33.Rohan has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  34. 34.3/4 − 3/10 =
  35. 35.Kabir has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  36. 36.5/6 − 1/9 =
  37. 37.A bottle has 2/3 litre of juice. Diya drinks 3/8 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 6/7 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  39. 39.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  40. 40.Rohan has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =

Answer key

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

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