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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 253 · 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 − 1/4 =
  2. 2.3/5 − 3/10 =
  3. 3.A bottle has 1/2 litre of juice. Vihaan drinks 3/7 litre. How much juice is left (in litres)? =
  4. 4.2/5 − 1/6 =
  5. 5.A bottle has 5/9 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 1/2 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  7. 7.Vihaan has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  8. 8.Aarav has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  9. 9.Vihaan has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  11. 11.A tank is 7/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 2/3 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  13. 13.Kabir has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  14. 14.Tara has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  15. 15.3/4 − 3/7 =
  16. 16.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.9/10 − 5/6 =
  18. 18.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? =
  19. 19.5/6 − 5/8 =
  20. 20.Anaya has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  21. 21.5/8 − 1/3 =
  22. 22.A bottle has 1/4 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 7/8 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  24. 24.1/6 − 1/8 =
  25. 25.9/10 − 2/3 =
  26. 26.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  27. 27.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? =
  28. 28.Tara has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  29. 29.2/3 − 2/5 =
  30. 30.2/3 − 3/10 =
  31. 31.5/6 − 7/9 =
  32. 32.2/3 − 3/7 =
  33. 33.A bottle has 3/4 litre of juice. Rohan drinks 3/7 litre. How much juice is left (in litres)? =
  34. 34.2/3 − 4/9 =
  35. 35.1/2 − 3/7 =
  36. 36.A bottle has 9/10 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  37. 37.5/6 − 1/3 =
  38. 38.1/4 − 1/5 =
  39. 39.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? =
  40. 40.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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