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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 795 · 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 7/8 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  2. 2.4/5 − 3/4 =
  3. 3.6/7 − 2/3 =
  4. 4.A bottle has 4/5 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  6. 6.7/8 − 3/4 =
  7. 7.1/2 − 1/5 =
  8. 8.3/4 − 3/7 =
  9. 9.3/4 − 5/8 =
  10. 10.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  11. 11.4/5 − 2/3 =
  12. 12.Rohan has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  13. 13.4/5 − 1/6 =
  14. 14.A tank is 5/6 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  15. 15.4/7 − 1/2 =
  16. 16.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  17. 17.A bottle has 1/2 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  18. 18.1/3 − 2/7 =
  19. 19.7/10 − 2/5 =
  20. 20.1/3 − 1/9 =
  21. 21.Sara has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 3/4 litre of juice. Aarav drinks 7/10 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 7/8 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  24. 24.2/3 − 5/8 =
  25. 25.6/7 − 3/4 =
  26. 26.5/6 − 7/9 =
  27. 27.Diya has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  28. 28.5/6 − 1/8 =
  29. 29.A bottle has 5/6 litre of juice. Diya drinks 2/5 litre. How much juice is left (in litres)? =
  30. 30.3/4 − 1/10 =
  31. 31.9/10 − 2/5 =
  32. 32.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? =
  33. 33.3/4 − 5/7 =
  34. 34.1/3 − 1/5 =
  35. 35.Aarav has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  36. 36.3/8 − 1/4 =
  37. 37.7/10 − 3/5 =
  38. 38.2/3 − 1/7 =
  39. 39.1/2 − 1/8 =
  40. 40.Sara has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =

Answer key

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

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