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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 22 · 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 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 8/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.1/3 − 1/5 =
  4. 4.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  5. 5.1/5 − 1/6 =
  6. 6.5/8 − 1/6 =
  7. 7.1/2 − 2/9 =
  8. 8.Aarav has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  9. 9.4/5 − 7/10 =
  10. 10.1/4 − 1/5 =
  11. 11.5/8 − 1/4 =
  12. 12.Diya has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  13. 13.A bottle has 3/8 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  14. 14.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  15. 15.A bottle has 3/10 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 6/7 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  17. 17.A tank is 1/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 5/8 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  19. 19.7/10 − 1/5 =
  20. 20.Diya has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  21. 21.A bottle has 1/2 litre of juice. Anaya drinks 2/7 litre. How much juice is left (in litres)? =
  22. 22.9/10 − 2/3 =
  23. 23.3/4 − 4/7 =
  24. 24.A bottle has 7/9 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  25. 25.2/9 − 1/6 =
  26. 26.A bottle has 2/3 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  27. 27.1/2 − 2/7 =
  28. 28.A bottle has 1/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  29. 29.A tank is 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  30. 30.Sara has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  31. 31.8/9 − 1/3 =
  32. 32.A bottle has 5/7 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.Rohan has a ribbon 9/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.9/10 − 5/6 =
  35. 35.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? =
  36. 36.A bottle has 3/4 litre of juice. Kabir drinks 4/7 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 1/6 litre of juice. Arjun drinks 1/9 litre. How much juice is left (in litres)? =
  38. 38.A tank is 5/6 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  39. 39.Tara has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  40. 40.5/6 − 2/9 =

Answer key

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

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