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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 886 · 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.Arjun has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  2. 2.A bottle has 2/3 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  3. 3.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/5 − 1/4 =
  5. 5.A bottle has 6/7 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  6. 6.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? =
  7. 7.1/2 − 2/9 =
  8. 8.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? =
  9. 9.A bottle has 4/9 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  10. 10.6/7 − 2/3 =
  11. 11.1/4 − 1/7 =
  12. 12.Kabir has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  13. 13.Sara has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  14. 14.5/6 − 2/9 =
  15. 15.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  16. 16.Tara has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  17. 17.3/4 − 3/8 =
  18. 18.2/5 − 1/3 =
  19. 19.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  20. 20.3/4 − 3/10 =
  21. 21.2/5 − 1/10 =
  22. 22.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? =
  23. 23.A bottle has 2/3 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  24. 24.9/10 − 4/5 =
  25. 25.3/4 − 5/8 =
  26. 26.5/6 − 1/4 =
  27. 27.4/9 − 1/6 =
  28. 28.Diya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  29. 29.1/4 − 1/8 =
  30. 30.Vihaan has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  31. 31.4/5 − 1/2 =
  32. 32.1/2 − 1/4 =
  33. 33.4/5 − 7/10 =
  34. 34.A bottle has 5/6 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 1/4 litre of juice. Rohan drinks 1/8 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 3/4 litre of juice. Rohan drinks 4/7 litre. How much juice is left (in litres)? =
  37. 37.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.Aarav has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  39. 39.1/3 − 1/5 =
  40. 40.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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