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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 264 · 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 − 1/6 =
  2. 2.A bottle has 3/7 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  3. 3.3/8 − 1/4 =
  4. 4.A bottle has 5/7 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.3/4 − 5/8 =
  6. 6.8/9 − 5/6 =
  7. 7.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.A bottle has 7/8 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  9. 9.2/3 − 4/9 =
  10. 10.6/7 − 1/2 =
  11. 11.1/2 − 3/7 =
  12. 12.2/3 − 1/7 =
  13. 13.3/4 − 1/6 =
  14. 14.Rohan has a ribbon 5/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  15. 15.5/9 − 1/2 =
  16. 16.5/9 − 1/3 =
  17. 17.A tank is 7/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  18. 18.1/3 − 1/7 =
  19. 19.2/7 − 1/4 =
  20. 20.6/7 − 3/4 =
  21. 21.Kabir has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  22. 22.5/7 − 1/4 =
  23. 23.5/6 − 2/3 =
  24. 24.A bottle has 5/6 litre of juice. Ishaan drinks 4/9 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 1/2 litre of juice. Riya drinks 1/8 litre. How much juice is left (in litres)? =
  26. 26.2/3 − 3/5 =
  27. 27.3/4 − 1/5 =
  28. 28.2/5 − 1/3 =
  29. 29.A bottle has 2/3 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  30. 30.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  31. 31.1/2 − 3/8 =
  32. 32.A tank is 1/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 9/10 litre of juice. Anaya drinks 2/5 litre. How much juice is left (in litres)? =
  34. 34.4/5 − 3/4 =
  35. 35.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? =
  36. 36.A bottle has 2/7 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  37. 37.1/4 − 1/10 =
  38. 38.8/9 − 1/2 =
  39. 39.A bottle has 5/6 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  40. 40.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? =

Answer key

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

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