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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 56 · 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. 1.8/9 − 1/3 =
  2. 2.Kabir has a ribbon 7/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 5/6 litre of juice. Tara drinks 2/9 litre. How much juice is left (in litres)? =
  4. 4.9/10 − 2/5 =
  5. 5.5/8 − 1/3 =
  6. 6.1/6 − 1/10 =
  7. 7.1/3 − 2/9 =
  8. 8.9/10 − 3/5 =
  9. 9.A bottle has 1/2 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  10. 10.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  11. 11.A bottle has 7/10 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  12. 12.7/8 − 3/4 =
  13. 13.3/7 − 1/4 =
  14. 14.7/8 − 1/3 =
  15. 15.A tank is 9/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  16. 16.5/9 − 1/3 =
  17. 17.2/5 − 1/3 =
  18. 18.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? =
  19. 19.3/4 − 1/10 =
  20. 20.A bottle has 3/5 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  21. 21.4/7 − 1/3 =
  22. 22.9/10 − 1/5 =
  23. 23.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 2/5 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  25. 25.9/10 − 1/2 =
  26. 26.Vihaan has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  27. 27.2/5 − 1/4 =
  28. 28.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.Aarav has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  30. 30.Rohan has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  31. 31.Rohan has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  32. 32.3/4 − 2/7 =
  33. 33.A bottle has 1/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  34. 34.1/2 − 1/4 =
  35. 35.A bottle has 7/9 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.Sara has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  37. 37.5/8 − 1/6 =
  38. 38.5/9 − 1/6 =
  39. 39.1/3 − 1/6 =
  40. 40.A tank is 2/3 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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