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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 445 · 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.Aarav has a ribbon 1/2 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  2. 2.9/10 − 5/6 =
  3. 3.3/5 − 1/4 =
  4. 4.2/3 − 5/8 =
  5. 5.1/3 − 2/7 =
  6. 6.A bottle has 5/6 litre of juice. Rohan drinks 3/8 litre. How much juice is left (in litres)? =
  7. 7.Diya has a ribbon 2/3 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  8. 8.5/6 − 5/8 =
  9. 9.Rohan has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  10. 10.A bottle has 4/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 4/5 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.5/8 − 1/2 =
  15. 15.8/9 − 2/3 =
  16. 16.1/2 − 1/8 =
  17. 17.1/2 − 2/9 =
  18. 18.A bottle has 5/6 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 4/5 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  20. 20.7/10 − 2/5 =
  21. 21.6/7 − 2/3 =
  22. 22.Sara has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.Sara has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  24. 24.6/7 − 1/4 =
  25. 25.Anaya has a ribbon 2/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 2/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  27. 27.1/3 − 1/7 =
  28. 28.5/9 − 1/3 =
  29. 29.5/7 − 1/2 =
  30. 30.1/2 − 1/5 =
  31. 31.2/3 − 2/9 =
  32. 32.A bottle has 2/9 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  33. 33.5/6 − 7/9 =
  34. 34.A bottle has 3/4 litre of juice. Kabir drinks 5/8 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 5/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.2/3 − 4/7 =
  37. 37.A bottle has 5/8 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.2/3 − 1/10 =
  39. 39.1/2 − 4/9 =
  40. 40.Anaya has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =

Answer key

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

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