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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 437 · 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 1/4 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  2. 2.7/8 − 1/2 =
  3. 3.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  4. 4.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  5. 5.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  6. 6.7/9 − 1/2 =
  7. 7.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  8. 8.6/7 − 2/3 =
  9. 9.A bottle has 1/3 litre of juice. Aarav drinks 2/7 litre. How much juice is left (in litres)? =
  10. 10.4/5 − 1/2 =
  11. 11.Vihaan has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  12. 12.1/5 − 1/6 =
  13. 13.1/6 − 1/9 =
  14. 14.7/9 − 1/6 =
  15. 15.7/10 − 1/5 =
  16. 16.Sara has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 1/2 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 7/8 litre of juice. Vihaan drinks 3/4 litre. How much juice is left (in litres)? =
  19. 19.1/2 − 1/9 =
  20. 20.3/5 − 1/6 =
  21. 21.A bottle has 6/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.2/7 − 1/4 =
  23. 23.6/7 − 3/4 =
  24. 24.7/10 − 1/6 =
  25. 25.1/6 − 1/10 =
  26. 26.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 7/10 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  28. 28.3/4 − 4/7 =
  29. 29.A bottle has 1/4 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 3/4 litre of juice. Aarav drinks 3/8 litre. How much juice is left (in litres)? =
  31. 31.5/6 − 7/10 =
  32. 32.5/8 − 1/6 =
  33. 33.A bottle has 1/2 litre of juice. Rohan drinks 3/7 litre. How much juice is left (in litres)? =
  34. 34.1/2 − 1/7 =
  35. 35.A bottle has 4/5 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  36. 36.2/3 − 1/10 =
  37. 37.A bottle has 8/9 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 1/3 litre of juice. Diya drinks 2/7 litre. How much juice is left (in litres)? =
  39. 39.A tank is 7/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.Aarav has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =

Answer key

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

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