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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 109 · 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 bottle has 7/9 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  2. 2.4/5 − 1/4 =
  3. 3.3/4 − 1/8 =
  4. 4.3/4 − 3/8 =
  5. 5.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? =
  6. 6.1/6 − 1/8 =
  7. 7.1/5 − 1/6 =
  8. 8.1/4 − 1/8 =
  9. 9.A bottle has 2/3 litre of juice. Arjun drinks 4/9 litre. How much juice is left (in litres)? =
  10. 10.5/8 − 1/3 =
  11. 11.5/8 − 1/6 =
  12. 12.2/5 − 1/3 =
  13. 13.7/9 − 1/6 =
  14. 14.3/8 − 1/3 =
  15. 15.5/6 − 2/5 =
  16. 16.1/2 − 1/3 =
  17. 17.2/9 − 1/6 =
  18. 18.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  19. 19.9/10 − 1/4 =
  20. 20.4/5 − 1/10 =
  21. 21.2/3 − 1/10 =
  22. 22.5/6 − 1/9 =
  23. 23.Sara has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  24. 24.3/4 − 2/3 =
  25. 25.Tara has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  26. 26.3/4 − 5/7 =
  27. 27.Aarav has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  28. 28.A tank is 1/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  29. 29.A bottle has 4/5 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.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? =
  31. 31.1/2 − 2/5 =
  32. 32.4/5 − 1/3 =
  33. 33.A bottle has 5/9 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  34. 34.8/9 − 1/3 =
  35. 35.5/7 − 2/3 =
  36. 36.Arjun has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 5/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  38. 38.7/10 − 1/2 =
  39. 39.1/2 − 4/9 =
  40. 40.7/10 − 1/5 =

Answer key

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

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