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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 42 · 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. 1.4/7 − 1/4 =
  2. 2.4/5 − 1/10 =
  3. 3.A bottle has 5/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  4. 4.9/10 − 4/5 =
  5. 5.3/4 − 5/7 =
  6. 6.Rohan has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  7. 7.8/9 − 1/6 =
  8. 8.3/8 − 1/4 =
  9. 9.A bottle has 8/9 litre of juice. Diya drinks 5/6 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 1/3 litre of juice. Sara drinks 3/10 litre. How much juice is left (in litres)? =
  11. 11.Sara has a ribbon 5/6 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  13. 13.2/3 − 3/10 =
  14. 14.A bottle has 1/4 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  15. 15.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  16. 16.A bottle has 4/5 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  17. 17.1/3 − 1/6 =
  18. 18.6/7 − 2/3 =
  19. 19.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  20. 20.7/10 − 1/2 =
  21. 21.7/9 − 1/2 =
  22. 22.Riya has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  23. 23.7/8 − 1/2 =
  24. 24.A tank is 3/4 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 2/5 litre of juice. Ishaan drinks 1/10 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 1/6 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  27. 27.5/6 − 1/8 =
  28. 28.2/7 − 1/4 =
  29. 29.5/8 − 1/6 =
  30. 30.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.6/7 − 1/4 =
  32. 32.Riya has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  33. 33.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  34. 34.9/10 − 3/5 =
  35. 35.A bottle has 2/3 litre of juice. Riya drinks 3/10 litre. How much juice is left (in litres)? =
  36. 36.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? =
  37. 37.Kabir has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  38. 38.A tank is 9/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  39. 39.5/9 − 1/3 =
  40. 40.A bottle has 1/2 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =

Answer key

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

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