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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 397 · 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. 1.2/3 − 3/10 =
  2. 2.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? =
  3. 3.A bottle has 3/5 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.Vihaan has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  5. 5.A bottle has 5/6 litre of juice. Diya drinks 5/9 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 4/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  7. 7.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  8. 8.Arjun has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  9. 9.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  10. 10.5/7 − 1/2 =
  11. 11.1/3 − 2/7 =
  12. 12.A bottle has 5/6 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  13. 13.7/8 − 1/2 =
  14. 14.8/9 − 2/3 =
  15. 15.8/9 − 1/2 =
  16. 16.5/8 − 1/3 =
  17. 17.A bottle has 4/5 litre of juice. Ishaan drinks 3/10 litre. How much juice is left (in litres)? =
  18. 18.9/10 − 2/5 =
  19. 19.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 6/7 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  21. 21.1/6 − 1/8 =
  22. 22.A tank is 9/10 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  23. 23.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 1/5 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  25. 25.5/6 − 3/8 =
  26. 26.1/2 − 3/7 =
  27. 27.A bottle has 6/7 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  28. 28.7/8 − 2/3 =
  29. 29.Arjun has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  30. 30.3/4 − 7/10 =
  31. 31.3/4 − 1/2 =
  32. 32.2/3 − 2/7 =
  33. 33.9/10 − 3/4 =
  34. 34.6/7 − 3/4 =
  35. 35.6/7 − 2/3 =
  36. 36.1/2 − 2/7 =
  37. 37.5/8 − 1/4 =
  38. 38.5/8 − 1/2 =
  39. 39.2/3 − 4/7 =
  40. 40.2/9 − 1/6 =

Answer key

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

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