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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 955 · 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. 1.1/2 − 3/7 =
  2. 2.A bottle has 1/2 litre of juice. Sara drinks 1/9 litre. How much juice is left (in litres)? =
  3. 3.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  4. 4.9/10 − 2/3 =
  5. 5.5/6 − 4/9 =
  6. 6.A bottle has 5/9 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  7. 7.4/5 − 1/4 =
  8. 8.3/4 − 1/3 =
  9. 9.3/4 − 2/3 =
  10. 10.5/6 − 1/5 =
  11. 11.A bottle has 5/6 litre of juice. Riya drinks 4/5 litre. How much juice is left (in litres)? =
  12. 12.2/3 − 2/5 =
  13. 13.A bottle has 5/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 8/9 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.1/4 − 1/5 =
  16. 16.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.Tara has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  18. 18.Riya has a ribbon 1/2 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  20. 20.1/2 − 1/3 =
  21. 21.Diya has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  22. 22.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  23. 23.A bottle has 5/8 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  24. 24.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 2/3 litre of juice. Ishaan drinks 4/9 litre. How much juice is left (in litres)? =
  26. 26.1/2 − 1/10 =
  27. 27.5/9 − 1/3 =
  28. 28.A bottle has 1/3 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  29. 29.3/4 − 3/7 =
  30. 30.A bottle has 1/3 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  31. 31.3/5 − 1/10 =
  32. 32.3/4 − 4/7 =
  33. 33.Riya has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  34. 34.9/10 − 4/5 =
  35. 35.A tank is 5/6 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  36. 36.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? =
  37. 37.5/8 − 1/4 =
  38. 38.2/3 − 5/8 =
  39. 39.1/2 − 1/5 =
  40. 40.A bottle has 5/7 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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