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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 623 · 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. 1.9/10 − 1/4 =
  2. 2.5/8 − 1/4 =
  3. 3.A bottle has 4/5 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  4. 4.4/5 − 1/2 =
  5. 5.7/10 − 1/5 =
  6. 6.2/3 − 3/7 =
  7. 7.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.A tank is 5/6 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 1/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  10. 10.7/10 − 2/5 =
  11. 11.Tara has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  12. 12.1/3 − 1/10 =
  13. 13.5/6 − 2/9 =
  14. 14.A bottle has 6/7 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  15. 15.1/2 − 1/7 =
  16. 16.2/5 − 3/10 =
  17. 17.A bottle has 1/3 litre of juice. Ishaan drinks 2/7 litre. How much juice is left (in litres)? =
  18. 18.A tank is 3/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  19. 19.A tank is 7/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 2/3 litre of juice. Riya drinks 2/5 litre. How much juice is left (in litres)? =
  21. 21.5/6 − 4/9 =
  22. 22.3/4 − 1/5 =
  23. 23.3/4 − 3/8 =
  24. 24.4/5 − 1/10 =
  25. 25.5/6 − 1/9 =
  26. 26.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/3 − 2/5 =
  28. 28.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.Diya has a ribbon 2/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  31. 31.1/6 − 1/8 =
  32. 32.5/8 − 1/3 =
  33. 33.A bottle has 5/6 litre of juice. Meera drinks 4/9 litre. How much juice is left (in litres)? =
  34. 34.Tara has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  35. 35.3/4 − 1/3 =
  36. 36.1/2 − 1/8 =
  37. 37.A bottle has 2/3 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  38. 38.2/3 − 1/2 =
  39. 39.6/7 − 1/2 =
  40. 40.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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