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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 224 · 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. 1.4/7 − 1/3 =
  2. 2.2/5 − 1/10 =
  3. 3.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  4. 4.7/10 − 1/6 =
  5. 5.Tara has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.3/7 − 1/3 =
  8. 8.3/7 − 1/4 =
  9. 9.3/4 − 3/8 =
  10. 10.5/6 − 2/3 =
  11. 11.3/5 − 1/3 =
  12. 12.A bottle has 3/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  13. 13.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.Arjun has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  15. 15.A bottle has 6/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.5/6 − 1/9 =
  17. 17.3/10 − 1/4 =
  18. 18.A bottle has 5/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  20. 20.1/2 − 3/7 =
  21. 21.7/8 − 1/3 =
  22. 22.A tank is 2/3 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  23. 23.8/9 − 2/3 =
  24. 24.Ishaan has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  25. 25.1/3 − 3/10 =
  26. 26.Tara has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  27. 27.A bottle has 2/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  28. 28.1/2 − 1/5 =
  29. 29.7/8 − 5/6 =
  30. 30.A bottle has 5/6 litre of juice. Rohan drinks 7/9 litre. How much juice is left (in litres)? =
  31. 31.8/9 − 1/2 =
  32. 32.Rohan has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 1/3 litre of juice. Ishaan drinks 1/8 litre. How much juice is left (in litres)? =
  34. 34.6/7 − 2/3 =
  35. 35.5/6 − 4/5 =
  36. 36.5/6 − 7/10 =
  37. 37.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 9/10 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  39. 39.Rohan has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  40. 40.3/5 − 1/2 =

Answer key

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

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