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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 84 · 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 3/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  4. 4.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? =
  5. 5.Meera has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  6. 6.6/7 − 1/3 =
  7. 7.A bottle has 2/3 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  8. 8.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  9. 9.3/4 − 3/5 =
  10. 10.5/9 − 1/6 =
  11. 11.3/4 − 3/7 =
  12. 12.A bottle has 1/3 litre of juice. Vihaan drinks 1/9 litre. How much juice is left (in litres)? =
  13. 13.3/4 − 3/8 =
  14. 14.6/7 − 2/3 =
  15. 15.7/8 − 1/2 =
  16. 16.A bottle has 1/2 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =
  17. 17.A bottle has 6/7 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 2/3 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  19. 19.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.5/9 − 1/2 =
  21. 21.5/7 − 1/3 =
  22. 22.Ishaan has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.Riya has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  24. 24.5/7 − 1/2 =
  25. 25.4/5 − 2/3 =
  26. 26.8/9 − 2/3 =
  27. 27.A bottle has 3/8 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 1/3 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.Rohan has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  30. 30.1/2 − 1/9 =
  31. 31.5/6 − 1/8 =
  32. 32.6/7 − 3/4 =
  33. 33.7/10 − 1/6 =
  34. 34.5/6 − 1/4 =
  35. 35.1/3 − 3/10 =
  36. 36.A tank is 1/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  37. 37.2/3 − 3/7 =
  38. 38.A bottle has 3/4 litre of juice. Aarav drinks 5/7 litre. How much juice is left (in litres)? =
  39. 39.5/6 − 1/5 =
  40. 40.5/6 − 7/9 =

Answer key

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

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