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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 275 · 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.A bottle has 9/10 litre of juice. Vihaan drinks 3/5 litre. How much juice is left (in litres)? =
  2. 2.5/6 − 5/9 =
  3. 3.A bottle has 7/8 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  4. 4.Rohan has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  5. 5.1/6 − 1/10 =
  6. 6.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  7. 7.8/9 − 1/6 =
  8. 8.5/8 − 1/3 =
  9. 9.8/9 − 1/3 =
  10. 10.7/9 − 1/6 =
  11. 11.A bottle has 2/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 5/6 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  13. 13.8/9 − 5/6 =
  14. 14.5/6 − 1/9 =
  15. 15.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.Diya has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  17. 17.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  18. 18.Riya has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  19. 19.7/9 − 1/3 =
  20. 20.A bottle has 1/3 litre of juice. Sara drinks 2/9 litre. How much juice is left (in litres)? =
  21. 21.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  22. 22.3/4 − 1/8 =
  23. 23.1/6 − 1/9 =
  24. 24.5/6 − 4/5 =
  25. 25.9/10 − 1/4 =
  26. 26.3/4 − 1/10 =
  27. 27.1/3 − 1/10 =
  28. 28.A bottle has 3/4 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  29. 29.5/6 − 5/8 =
  30. 30.1/3 − 1/5 =
  31. 31.Diya has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  32. 32.A bottle has 2/3 litre of juice. Rohan drinks 2/7 litre. How much juice is left (in litres)? =
  33. 33.5/6 − 1/2 =
  34. 34.7/10 − 1/6 =
  35. 35.3/8 − 1/3 =
  36. 36.A bottle has 5/6 litre of juice. Ishaan drinks 2/3 litre. How much juice is left (in litres)? =
  37. 37.4/5 − 1/3 =
  38. 38.6/7 − 2/3 =
  39. 39.2/3 − 4/7 =
  40. 40.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? =

Answer key

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

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