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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 778 · 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.Meera has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  2. 2.5/7 − 1/2 =
  3. 3.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  4. 4.Vihaan has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  5. 5.7/8 − 3/4 =
  6. 6.4/7 − 1/4 =
  7. 7.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  8. 8.5/7 − 1/4 =
  9. 9.Ishaan has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  10. 10.A bottle has 2/3 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 3/4 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 7/8 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  13. 13.7/9 − 1/2 =
  14. 14.Sara has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  15. 15.5/8 − 1/2 =
  16. 16.5/6 − 3/8 =
  17. 17.2/5 − 1/10 =
  18. 18.4/7 − 1/3 =
  19. 19.3/5 − 1/10 =
  20. 20.Ishaan has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  21. 21.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.2/5 − 1/4 =
  23. 23.3/8 − 1/4 =
  24. 24.4/7 − 1/2 =
  25. 25.1/3 − 1/4 =
  26. 26.A bottle has 5/8 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  27. 27.7/8 − 1/2 =
  28. 28.Vihaan has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 1/2 litre of juice. Rohan drinks 2/5 litre. How much juice is left (in litres)? =
  30. 30.7/10 − 1/4 =
  31. 31.2/3 − 1/7 =
  32. 32.A bottle has 1/3 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  33. 33.2/5 − 3/10 =
  34. 34.A tank is 9/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 5/6 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 7/10 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  37. 37.A tank is 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.3/10 − 1/4 =
  39. 39.A bottle has 7/8 litre of juice. Kabir drinks 3/4 litre. How much juice is left (in litres)? =
  40. 40.5/6 − 2/3 =

Answer key

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

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