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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 521 · 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.Aarav has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  2. 2.Diya has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.3/10 − 1/5 =
  4. 4.A bottle has 5/6 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  5. 5.Rohan has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 2/5 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  7. 7.1/2 − 1/7 =
  8. 8.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.8/9 − 2/3 =
  10. 10.A bottle has 7/8 litre of juice. Riya drinks 3/4 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 1/3 litre of juice. Kabir drinks 1/7 litre. How much juice is left (in litres)? =
  12. 12.1/4 − 1/5 =
  13. 13.A tank is 9/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.Meera has a ribbon 1/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  15. 15.1/2 − 1/6 =
  16. 16.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.3/4 − 3/5 =
  18. 18.A bottle has 2/3 litre of juice. Rohan drinks 2/7 litre. How much juice is left (in litres)? =
  19. 19.Meera has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  20. 20.1/3 − 1/9 =
  21. 21.1/4 − 1/10 =
  22. 22.Riya has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  23. 23.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  24. 24.Riya has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  25. 25.Diya has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  27. 27.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  28. 28.5/6 − 4/9 =
  29. 29.A bottle has 5/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.8/9 − 5/6 =
  31. 31.A tank is 1/2 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  32. 32.2/3 − 2/9 =
  33. 33.A bottle has 3/4 litre of juice. Arjun drinks 3/7 litre. How much juice is left (in litres)? =
  34. 34.9/10 − 3/5 =
  35. 35.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  36. 36.A bottle has 7/8 litre of juice. Kabir drinks 3/4 litre. How much juice is left (in litres)? =
  37. 37.3/4 − 1/3 =
  38. 38.Vihaan has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 4/5 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  40. 40.A tank is 7/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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