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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 759 · 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. 1.1/3 − 2/9 =
  2. 2.7/8 − 1/2 =
  3. 3.Sara has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  4. 4.A bottle has 7/9 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.A bottle has 5/8 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.4/7 − 1/2 =
  7. 7.1/3 − 1/9 =
  8. 8.Kabir has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  9. 9.1/2 − 2/9 =
  10. 10.A bottle has 5/7 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  11. 11.1/2 − 3/7 =
  12. 12.A bottle has 5/7 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  14. 14.2/3 − 1/7 =
  15. 15.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  16. 16.1/2 − 3/10 =
  17. 17.8/9 − 1/3 =
  18. 18.A bottle has 2/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.3/4 − 3/10 =
  20. 20.7/10 − 1/4 =
  21. 21.5/6 − 5/9 =
  22. 22.5/8 − 1/3 =
  23. 23.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  24. 24.2/3 − 1/9 =
  25. 25.Meera has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  26. 26.4/5 − 3/4 =
  27. 27.1/3 − 1/8 =
  28. 28.3/4 − 3/5 =
  29. 29.A bottle has 5/6 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  30. 30.Vihaan has a ribbon 4/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 1/2 litre of juice. Arjun drinks 2/7 litre. How much juice is left (in litres)? =
  32. 32.7/10 − 1/6 =
  33. 33.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  34. 34.5/6 − 3/4 =
  35. 35.2/3 − 4/9 =
  36. 36.A bottle has 5/8 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  37. 37.3/4 − 1/8 =
  38. 38.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  39. 39.Aarav has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  40. 40.Kabir has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =

Answer key

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

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