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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 473 · 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.Kabir has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.A bottle has 8/9 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.A tank is 7/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 5/8 =
  5. 5.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? =
  6. 6.5/6 − 5/8 =
  7. 7.1/3 − 1/4 =
  8. 8.2/3 − 4/9 =
  9. 9.8/9 − 1/2 =
  10. 10.A bottle has 1/2 litre of juice. Riya drinks 2/9 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 5/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  12. 12.Rohan has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  13. 13.1/4 − 1/7 =
  14. 14.3/4 − 7/10 =
  15. 15.6/7 − 1/2 =
  16. 16.A bottle has 5/6 litre of juice. Vihaan drinks 5/9 litre. How much juice is left (in litres)? =
  17. 17.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? =
  18. 18.4/5 − 1/4 =
  19. 19.3/4 − 2/5 =
  20. 20.7/10 − 1/3 =
  21. 21.A tank is 1/2 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  22. 22.A bottle has 1/2 litre of juice. Riya drinks 1/5 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 1/2 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 4/5 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 2/3 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  26. 26.2/5 − 1/3 =
  27. 27.Anaya has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  28. 28.Diya has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  29. 29.4/5 − 1/3 =
  30. 30.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? =
  31. 31.2/3 − 1/9 =
  32. 32.8/9 − 1/6 =
  33. 33.5/7 − 2/3 =
  34. 34.Anaya has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  35. 35.3/4 − 3/8 =
  36. 36.5/6 − 3/5 =
  37. 37.9/10 − 2/3 =
  38. 38.A bottle has 3/10 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  39. 39.Kabir has a ribbon 9/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  40. 40.3/8 − 1/3 =

Answer key

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

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