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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 323 · 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. 1.3/5 − 1/6 =
  2. 2.9/10 − 1/6 =
  3. 3.3/5 − 1/4 =
  4. 4.4/5 − 1/10 =
  5. 5.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  6. 6.4/7 − 1/4 =
  7. 7.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  8. 8.9/10 − 2/3 =
  9. 9.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  10. 10.1/3 − 1/9 =
  11. 11.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? =
  12. 12.1/4 − 1/5 =
  13. 13.A bottle has 1/2 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 2/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.4/7 − 1/2 =
  16. 16.1/3 − 2/7 =
  17. 17.Ishaan has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  18. 18.4/5 − 1/4 =
  19. 19.A bottle has 8/9 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 3/5 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 1/4 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 4/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 3/7 =
  24. 24.1/3 − 1/5 =
  25. 25.Rohan has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  26. 26.3/4 − 5/7 =
  27. 27.1/2 − 2/7 =
  28. 28.5/6 − 7/9 =
  29. 29.2/3 − 5/8 =
  30. 30.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  31. 31.Sara has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  32. 32.Tara has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  33. 33.Sara has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 1/2 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  35. 35.4/7 − 1/3 =
  36. 36.7/9 − 2/3 =
  37. 37.5/7 − 1/3 =
  38. 38.Riya has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  39. 39.8/9 − 2/3 =
  40. 40.A bottle has 4/9 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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