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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 807 · 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 − 2/5 =
  2. 2.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  3. 3.Riya has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  4. 4.Aarav has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  5. 5.4/5 − 1/3 =
  6. 6.1/2 − 1/9 =
  7. 7.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  8. 8.A bottle has 3/5 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  9. 9.A tank is 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  10. 10.6/7 − 1/2 =
  11. 11.3/4 − 1/8 =
  12. 12.8/9 − 1/2 =
  13. 13.4/7 − 1/4 =
  14. 14.A bottle has 1/3 litre of juice. Vihaan drinks 1/7 litre. How much juice is left (in litres)? =
  15. 15.A tank is 3/4 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.Tara has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  17. 17.7/10 − 2/3 =
  18. 18.Rohan has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  19. 19.A bottle has 2/7 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  20. 20.4/5 − 1/4 =
  21. 21.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  22. 22.Rohan has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  23. 23.5/6 − 1/3 =
  24. 24.A bottle has 8/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  25. 25.1/2 − 1/7 =
  26. 26.A tank is 1/2 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  27. 27.1/5 − 1/10 =
  28. 28.7/8 − 2/3 =
  29. 29.9/10 − 1/5 =
  30. 30.3/4 − 2/5 =
  31. 31.A bottle has 5/6 litre of juice. Vihaan drinks 4/9 litre. How much juice is left (in litres)? =
  32. 32.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.2/3 − 1/9 =
  34. 34.3/4 − 3/5 =
  35. 35.8/9 − 1/6 =
  36. 36.A bottle has 1/5 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  37. 37.8/9 − 1/3 =
  38. 38.4/7 − 1/3 =
  39. 39.3/8 − 1/4 =
  40. 40.3/4 − 1/10 =

Answer key

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

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