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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 185 · 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. 1.3/5 − 1/6 =
  2. 2.3/7 − 1/3 =
  3. 3.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  4. 4.3/4 − 1/8 =
  5. 5.A bottle has 5/6 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  6. 6.9/10 − 1/5 =
  7. 7.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? =
  8. 8.1/5 − 1/6 =
  9. 9.7/9 − 1/6 =
  10. 10.5/6 − 1/9 =
  11. 11.A bottle has 3/4 litre of juice. Vihaan drinks 2/5 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 5/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  13. 13.Rohan has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  14. 14.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  15. 15.1/2 − 2/7 =
  16. 16.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  17. 17.A bottle has 7/8 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  18. 18.2/3 − 5/8 =
  19. 19.3/8 − 1/3 =
  20. 20.6/7 − 1/3 =
  21. 21.1/4 − 1/7 =
  22. 22.A bottle has 2/5 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  23. 23.5/8 − 1/2 =
  24. 24.5/6 − 4/9 =
  25. 25.7/9 − 1/2 =
  26. 26.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? =
  27. 27.5/6 − 4/5 =
  28. 28.3/5 − 1/2 =
  29. 29.Diya has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  30. 30.5/9 − 1/3 =
  31. 31.A bottle has 5/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 2/5 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  33. 33.Vihaan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  34. 34.Aarav has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  35. 35.3/4 − 1/2 =
  36. 36.Kabir has a ribbon 1/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 2/3 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  38. 38.8/9 − 1/3 =
  39. 39.3/4 − 1/10 =
  40. 40.Kabir has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =

Answer key

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

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