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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 571 · 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.A bottle has 3/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  2. 2.A bottle has 5/7 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.3/7 − 1/4 =
  4. 4.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  5. 5.Aarav has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  6. 6.4/9 − 1/3 =
  7. 7.7/9 − 2/3 =
  8. 8.Sara has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  9. 9.4/5 − 3/4 =
  10. 10.7/8 − 1/2 =
  11. 11.Sara has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  12. 12.Rohan has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  13. 13.5/8 − 1/4 =
  14. 14.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? =
  15. 15.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? =
  16. 16.5/9 − 1/3 =
  17. 17.A bottle has 2/7 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 5/8 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 7/10 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.8/9 − 5/6 =
  21. 21.2/9 − 1/6 =
  22. 22.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  23. 23.1/3 − 3/10 =
  24. 24.3/5 − 1/6 =
  25. 25.Tara has a ribbon 1/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  26. 26.2/3 − 2/7 =
  27. 27.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? =
  28. 28.3/4 − 1/3 =
  29. 29.2/3 − 1/10 =
  30. 30.Ishaan has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  31. 31.3/5 − 1/3 =
  32. 32.3/5 − 1/2 =
  33. 33.A bottle has 2/3 litre of juice. Anaya drinks 2/5 litre. How much juice is left (in litres)? =
  34. 34.1/2 − 3/8 =
  35. 35.A bottle has 4/5 litre of juice. Vihaan drinks 3/10 litre. How much juice is left (in litres)? =
  36. 36.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.1/2 − 2/7 =
  38. 38.A bottle has 3/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  39. 39.3/4 − 1/7 =
  40. 40.1/4 − 1/7 =

Answer key

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

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