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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 967 · 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. 2.5/6 − 7/9 =
  3. 3.2/3 − 1/2 =
  4. 4.A bottle has 6/7 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  5. 5.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  6. 6.A bottle has 8/9 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  7. 7.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  8. 8.1/4 − 1/8 =
  9. 9.5/6 − 1/4 =
  10. 10.2/3 − 1/8 =
  11. 11.1/2 − 1/5 =
  12. 12.Diya has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  13. 13.A bottle has 9/10 litre of juice. Ishaan drinks 3/5 litre. How much juice is left (in litres)? =
  14. 14.3/4 − 2/3 =
  15. 15.A tank is 1/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.Vihaan has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  17. 17.1/2 − 3/7 =
  18. 18.6/7 − 1/3 =
  19. 19.5/7 − 1/3 =
  20. 20.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? =
  21. 21.Meera has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  22. 22.7/8 − 5/6 =
  23. 23.A bottle has 3/5 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 2/7 =
  25. 25.2/3 − 1/9 =
  26. 26.A bottle has 5/6 litre of juice. Riya drinks 1/5 litre. How much juice is left (in litres)? =
  27. 27.2/7 − 1/4 =
  28. 28.5/6 − 2/9 =
  29. 29.1/3 − 1/8 =
  30. 30.1/2 − 1/7 =
  31. 31.Arjun has a ribbon 1/2 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  32. 32.4/5 − 1/6 =
  33. 33.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  34. 34.2/3 − 3/7 =
  35. 35.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  36. 36.Tara has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  37. 37.1/2 − 4/9 =
  38. 38.9/10 − 1/4 =
  39. 39.A bottle has 8/9 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.7/9 − 1/2 =

Answer key

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

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