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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 603 · 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. 1.1/3 − 1/9 =
  2. 2.Aarav has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 1/2 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 9/10 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  5. 5.Ishaan has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.1/5 − 1/6 =
  7. 7.1/6 − 1/9 =
  8. 8.8/9 − 1/3 =
  9. 9.3/4 − 1/2 =
  10. 10.6/7 − 1/3 =
  11. 11.A bottle has 1/3 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  12. 12.6/7 − 1/4 =
  13. 13.A bottle has 1/4 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  14. 14.Ishaan has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  15. 15.5/6 − 3/5 =
  16. 16.Anaya has a ribbon 7/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  17. 17.4/5 − 2/3 =
  18. 18.2/3 − 2/5 =
  19. 19.Aarav has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  20. 20.Sara has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  21. 21.5/7 − 1/3 =
  22. 22.Anaya has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.3/10 − 1/5 =
  24. 24.A bottle has 5/6 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  25. 25.6/7 − 3/4 =
  26. 26.7/8 − 1/4 =
  27. 27.A bottle has 5/6 litre of juice. Rohan drinks 5/8 litre. How much juice is left (in litres)? =
  28. 28.3/4 − 1/5 =
  29. 29.3/4 − 7/10 =
  30. 30.3/4 − 3/7 =
  31. 31.A bottle has 7/9 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.Arjun has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  33. 33.2/3 − 1/6 =
  34. 34.1/2 − 2/7 =
  35. 35.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  36. 36.Rohan has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  37. 37.2/3 − 4/9 =
  38. 38.3/4 − 4/7 =
  39. 39.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? =
  40. 40.A bottle has 2/3 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =

Answer key

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

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