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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 28 · 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. 1.1/4 − 1/10 =
  2. 2.A bottle has 6/7 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  3. 3.2/3 − 1/9 =
  4. 4.7/9 − 2/3 =
  5. 5.7/10 − 2/3 =
  6. 6.5/6 − 4/9 =
  7. 7.A bottle has 2/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  8. 8.1/4 − 1/8 =
  9. 9.1/3 − 1/6 =
  10. 10.7/10 − 3/5 =
  11. 11.4/9 − 1/6 =
  12. 12.1/4 − 1/6 =
  13. 13.1/3 − 2/9 =
  14. 14.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  15. 15.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.A bottle has 2/5 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  18. 18.3/5 − 1/10 =
  19. 19.Anaya has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  20. 20.5/7 − 1/2 =
  21. 21.1/3 − 1/5 =
  22. 22.A bottle has 2/3 litre of juice. Tara drinks 3/7 litre. How much juice is left (in litres)? =
  23. 23.1/3 − 3/10 =
  24. 24.1/2 − 2/7 =
  25. 25.A bottle has 1/3 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  26. 26.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/3 − 5/9 =
  28. 28.1/2 − 4/9 =
  29. 29.A bottle has 5/7 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  30. 30.5/6 − 1/9 =
  31. 31.5/9 − 1/2 =
  32. 32.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? =
  33. 33.A bottle has 5/9 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  34. 34.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  35. 35.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  36. 36.8/9 − 5/6 =
  37. 37.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  38. 38.Kabir has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  39. 39.Diya has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 1/2 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =

Answer key

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

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