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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 455 · 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 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  2. 2.Ishaan has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 3/5 =
  5. 5.1/3 − 1/5 =
  6. 6.7/9 − 1/6 =
  7. 7.2/3 − 1/4 =
  8. 8.7/8 − 1/3 =
  9. 9.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 7/9 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  11. 11.Kabir has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 7/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  13. 13.1/2 − 2/9 =
  14. 14.A bottle has 3/4 litre of juice. Anaya drinks 5/8 litre. How much juice is left (in litres)? =
  15. 15.9/10 − 1/4 =
  16. 16.2/3 − 1/9 =
  17. 17.Anaya has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 5/6 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  19. 19.2/5 − 1/3 =
  20. 20.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  21. 21.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  22. 22.9/10 − 2/5 =
  23. 23.1/3 − 1/9 =
  24. 24.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? =
  25. 25.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  26. 26.3/4 − 2/5 =
  27. 27.Arjun has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 4/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 4/5 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  30. 30.Ishaan has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  31. 31.5/6 − 1/4 =
  32. 32.A bottle has 2/5 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  33. 33.Tara has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  34. 34.7/10 − 1/5 =
  35. 35.3/5 − 1/10 =
  36. 36.1/2 − 1/9 =
  37. 37.A bottle has 2/3 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  38. 38.Rohan has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 1/6 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  40. 40.Arjun has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =

Answer key

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

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