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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 46 · 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. 1.7/10 − 2/5 =
  2. 2.A bottle has 3/4 litre of juice. Tara drinks 3/5 litre. How much juice is left (in litres)? =
  3. 3.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.A bottle has 1/3 litre of juice. Meera drinks 2/9 litre. How much juice is left (in litres)? =
  5. 5.5/8 − 1/2 =
  6. 6.Arjun has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 7/10 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.3/4 − 1/2 =
  9. 9.A tank is 5/7 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 1/3 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  11. 11.7/8 − 1/3 =
  12. 12.A bottle has 3/5 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.2/5 − 3/10 =
  14. 14.7/10 − 3/5 =
  15. 15.3/4 − 3/7 =
  16. 16.3/4 − 3/8 =
  17. 17.3/4 − 4/7 =
  18. 18.4/9 − 1/6 =
  19. 19.9/10 − 5/6 =
  20. 20.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  21. 21.9/10 − 1/5 =
  22. 22.A bottle has 4/5 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.7/8 − 2/3 =
  24. 24.8/9 − 5/6 =
  25. 25.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  26. 26.2/3 − 2/9 =
  27. 27.1/3 − 1/4 =
  28. 28.Tara has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  29. 29.Anaya has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 5/6 litre of juice. Aarav drinks 4/5 litre. How much juice is left (in litres)? =
  31. 31.3/5 − 1/4 =
  32. 32.A bottle has 8/9 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  33. 33.3/5 − 1/3 =
  34. 34.2/3 − 1/4 =
  35. 35.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  36. 36.A bottle has 3/4 litre of juice. Ishaan drinks 5/8 litre. How much juice is left (in litres)? =
  37. 37.1/3 − 2/9 =
  38. 38.4/5 − 7/10 =
  39. 39.A bottle has 8/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.8/9 − 1/2 =

Answer key

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

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