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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 688 · 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. 1.1/2 − 1/5 =
  2. 2.7/8 − 2/3 =
  3. 3.3/5 − 1/6 =
  4. 4.5/7 − 1/2 =
  5. 5.8/9 − 5/6 =
  6. 6.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  7. 7.2/5 − 3/10 =
  8. 8.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.1/3 − 1/9 =
  10. 10.9/10 − 1/3 =
  11. 11.Sara has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  13. 13.7/10 − 1/5 =
  14. 14.Aarav has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  15. 15.Meera has a ribbon 2/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  16. 16.Arjun has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 7/8 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 5/6 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  19. 19.Kabir has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  20. 20.2/3 − 3/7 =
  21. 21.Rohan has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  22. 22.Ishaan has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 2/3 litre of juice. Vihaan drinks 3/5 litre. How much juice is left (in litres)? =
  24. 24.9/10 − 2/5 =
  25. 25.Vihaan has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  26. 26.7/10 − 2/5 =
  27. 27.1/6 − 1/9 =
  28. 28.8/9 − 1/6 =
  29. 29.Tara has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  30. 30.5/6 − 7/9 =
  31. 31.Arjun has a ribbon 7/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.4/9 − 1/6 =
  33. 33.5/6 − 7/10 =
  34. 34.A bottle has 3/4 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  35. 35.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  36. 36.7/10 − 3/5 =
  37. 37.7/8 − 1/6 =
  38. 38.Arjun has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 8/9 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 1/3 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =

Answer key

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

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