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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 180 · 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 3/4 litre of juice. Vihaan drinks 4/7 litre. How much juice is left (in litres)? =
  2. 2.5/9 − 1/2 =
  3. 3.7/10 − 1/3 =
  4. 4.A bottle has 4/5 litre of juice. Sara drinks 7/10 litre. How much juice is left (in litres)? =
  5. 5.3/5 − 3/10 =
  6. 6.7/9 − 1/6 =
  7. 7.3/4 − 1/2 =
  8. 8.Vihaan has a ribbon 5/6 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  9. 9.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 5/6 litre of juice. Tara drinks 5/8 litre. How much juice is left (in litres)? =
  11. 11.4/5 − 1/3 =
  12. 12.3/4 − 1/7 =
  13. 13.2/3 − 3/7 =
  14. 14.3/4 − 3/5 =
  15. 15.Ishaan has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  16. 16.5/6 − 1/9 =
  17. 17.5/6 − 4/9 =
  18. 18.Diya has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 4/9 =
  20. 20.A bottle has 2/3 litre of juice. Kabir drinks 3/7 litre. How much juice is left (in litres)? =
  21. 21.1/4 − 1/8 =
  22. 22.A bottle has 1/4 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  23. 23.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.1/2 − 1/5 =
  25. 25.7/8 − 1/2 =
  26. 26.7/9 − 1/3 =
  27. 27.A bottle has 4/5 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 1/2 litre of juice. Vihaan drinks 3/8 litre. How much juice is left (in litres)? =
  29. 29.Rohan has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  30. 30.2/3 − 3/10 =
  31. 31.2/3 − 1/2 =
  32. 32.A bottle has 4/5 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 2/7 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  35. 35.1/2 − 1/3 =
  36. 36.A bottle has 7/10 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 1/4 litre of juice. Anaya drinks 1/8 litre. How much juice is left (in litres)? =
  38. 38.7/10 − 1/5 =
  39. 39.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? =
  40. 40.4/5 − 1/10 =

Answer key

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

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