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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 349 · 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. 1.2/3 − 3/5 =
  2. 2.2/3 − 2/5 =
  3. 3.9/10 − 1/6 =
  4. 4.A bottle has 8/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  5. 5.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  6. 6.Sara has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  7. 7.5/6 − 2/5 =
  8. 8.Riya has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  9. 9.A bottle has 3/10 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  10. 10.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  11. 11.5/7 − 1/3 =
  12. 12.A bottle has 3/5 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 5/6 litre of juice. Arjun drinks 2/5 litre. How much juice is left (in litres)? =
  14. 14.Vihaan has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  15. 15.7/10 − 2/5 =
  16. 16.6/7 − 1/3 =
  17. 17.2/3 − 4/9 =
  18. 18.4/9 − 1/3 =
  19. 19.5/6 − 2/9 =
  20. 20.3/4 − 1/2 =
  21. 21.2/5 − 3/10 =
  22. 22.1/6 − 1/9 =
  23. 23.7/9 − 2/3 =
  24. 24.Ishaan has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  25. 25.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 8/9 litre of juice. Tara drinks 5/6 litre. How much juice is left (in litres)? =
  27. 27.4/5 − 1/6 =
  28. 28.5/7 − 2/3 =
  29. 29.Rohan has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  30. 30.Sara has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 3/4 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  32. 32.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.5/8 − 1/4 =
  34. 34.1/2 − 4/9 =
  35. 35.Riya has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 5/6 litre of juice. Ishaan drinks 5/8 litre. How much juice is left (in litres)? =
  37. 37.Kabir has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  38. 38.4/5 − 3/10 =
  39. 39.2/3 − 1/2 =
  40. 40.A bottle has 3/4 litre of juice. Ishaan drinks 3/8 litre. How much juice is left (in litres)? =

Answer key

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

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