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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 555 · 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. 1.3/4 − 1/10 =
  2. 2.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? =
  3. 3.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? =
  4. 4.7/8 − 1/2 =
  5. 5.Diya has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  6. 6.2/7 − 1/4 =
  7. 7.2/3 − 2/9 =
  8. 8.A bottle has 5/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  9. 9.2/3 − 1/8 =
  10. 10.3/5 − 1/2 =
  11. 11.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? =
  12. 12.5/8 − 1/3 =
  13. 13.2/3 − 1/7 =
  14. 14.1/3 − 1/5 =
  15. 15.Kabir has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  16. 16.5/7 − 1/2 =
  17. 17.2/5 − 3/10 =
  18. 18.3/5 − 1/3 =
  19. 19.3/4 − 1/8 =
  20. 20.Rohan has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  21. 21.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.2/3 − 2/7 =
  23. 23.5/9 − 1/6 =
  24. 24.7/9 − 2/3 =
  25. 25.A bottle has 1/4 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  26. 26.1/3 − 1/6 =
  27. 27.Riya has a ribbon 1/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 3/10 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 5/8 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 2/5 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.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? =
  32. 32.A bottle has 7/9 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  33. 33.7/10 − 2/3 =
  34. 34.Tara has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.Anaya has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 1/4 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 7/10 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.7/9 − 1/2 =
  40. 40.1/2 − 3/7 =

Answer key

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

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