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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 298 · 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 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  2. 2.4/7 − 1/2 =
  3. 3.A bottle has 7/8 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  4. 4.Aarav has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  5. 5.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  6. 6.8/9 − 5/6 =
  7. 7.1/3 − 2/7 =
  8. 8.3/4 − 3/5 =
  9. 9.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 2/3 litre of juice. Meera drinks 3/7 litre. How much juice is left (in litres)? =
  11. 11.3/4 − 1/8 =
  12. 12.A bottle has 5/6 litre of juice. Riya drinks 3/4 litre. How much juice is left (in litres)? =
  13. 13.1/3 − 1/5 =
  14. 14.A bottle has 1/2 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  15. 15.3/10 − 1/4 =
  16. 16.7/8 − 1/6 =
  17. 17.3/5 − 3/10 =
  18. 18.A bottle has 2/3 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 2/3 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  20. 20.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? =
  21. 21.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.4/5 − 3/10 =
  23. 23.2/7 − 1/4 =
  24. 24.9/10 − 5/6 =
  25. 25.3/7 − 1/3 =
  26. 26.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  27. 27.5/7 − 1/3 =
  28. 28.Tara has a ribbon 9/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  29. 29.5/6 − 3/10 =
  30. 30.3/8 − 1/6 =
  31. 31.7/8 − 3/4 =
  32. 32.2/3 − 2/5 =
  33. 33.A bottle has 8/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  34. 34.Arjun has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  35. 35.7/8 − 5/6 =
  36. 36.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.2/3 − 1/6 =
  38. 38.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  39. 39.5/9 − 1/3 =
  40. 40.4/7 − 1/3 =

Answer key

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

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