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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 9 · 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. 1.9/10 − 2/5 =
  2. 2.A bottle has 5/9 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 2/3 litre of juice. Arjun drinks 5/9 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 2/5 litre of juice. Rohan drinks 3/10 litre. How much juice is left (in litres)? =
  5. 5.5/6 − 3/10 =
  6. 6.9/10 − 1/5 =
  7. 7.3/5 − 1/4 =
  8. 8.Meera has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  9. 9.6/7 − 2/3 =
  10. 10.1/2 − 3/7 =
  11. 11.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  12. 12.Sara has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  13. 13.3/4 − 3/7 =
  14. 14.5/6 − 2/9 =
  15. 15.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  16. 16.2/5 − 1/3 =
  17. 17.4/7 − 1/4 =
  18. 18.6/7 − 3/4 =
  19. 19.3/5 − 3/10 =
  20. 20.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  21. 21.7/8 − 2/3 =
  22. 22.5/8 − 1/2 =
  23. 23.2/3 − 1/6 =
  24. 24.8/9 − 1/3 =
  25. 25.5/6 − 4/5 =
  26. 26.1/4 − 1/7 =
  27. 27.1/5 − 1/6 =
  28. 28.A bottle has 1/4 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  29. 29.2/3 − 1/8 =
  30. 30.3/4 − 1/5 =
  31. 31.Rohan has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  32. 32.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  33. 33.3/4 − 1/3 =
  34. 34.Diya has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  35. 35.A bottle has 7/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 4/7 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  37. 37.5/7 − 1/2 =
  38. 38.3/4 − 4/7 =
  39. 39.5/6 − 1/9 =
  40. 40.5/6 − 1/5 =

Answer key

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

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