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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 653 · 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 2/7 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 2/3 litre of juice. Diya drinks 4/7 litre. How much juice is left (in litres)? =
  3. 3.7/10 − 1/5 =
  4. 4.7/10 − 3/5 =
  5. 5.2/9 − 1/6 =
  6. 6.Aarav has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  7. 7.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.3/7 − 1/3 =
  9. 9.4/7 − 1/4 =
  10. 10.7/10 − 1/4 =
  11. 11.A bottle has 3/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  12. 12.1/2 − 3/8 =
  13. 13.A bottle has 5/6 litre of juice. Anaya drinks 3/4 litre. How much juice is left (in litres)? =
  14. 14.5/7 − 1/3 =
  15. 15.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  16. 16.2/3 − 2/9 =
  17. 17.A bottle has 1/3 litre of juice. Aarav drinks 3/10 litre. How much juice is left (in litres)? =
  18. 18.7/8 − 2/3 =
  19. 19.9/10 − 1/5 =
  20. 20.A bottle has 5/6 litre of juice. Ishaan drinks 7/9 litre. How much juice is left (in litres)? =
  21. 21.1/2 − 1/7 =
  22. 22.2/5 − 1/6 =
  23. 23.7/9 − 1/3 =
  24. 24.8/9 − 1/6 =
  25. 25.A tank is 5/6 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 3/7 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  27. 27.Tara has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 8/9 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.Arjun has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 1/4 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  31. 31.7/8 − 3/4 =
  32. 32.4/7 − 1/3 =
  33. 33.Tara has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  34. 34.3/4 − 2/7 =
  35. 35.2/3 − 4/7 =
  36. 36.3/4 − 3/7 =
  37. 37.5/6 − 1/8 =
  38. 38.5/7 − 1/2 =
  39. 39.4/5 − 1/3 =
  40. 40.Rohan has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =

Answer key

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

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