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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 825 · 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.Tara has a ribbon 5/6 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  2. 2.3/5 − 1/4 =
  3. 3.7/8 − 3/4 =
  4. 4.9/10 − 3/5 =
  5. 5.2/3 − 2/9 =
  6. 6.3/8 − 1/4 =
  7. 7.1/2 − 3/7 =
  8. 8.Anaya has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  9. 9.5/7 − 1/4 =
  10. 10.7/10 − 2/3 =
  11. 11.Tara has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.6/7 − 3/4 =
  14. 14.2/3 − 2/7 =
  15. 15.4/9 − 1/6 =
  16. 16.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  17. 17.1/6 − 1/9 =
  18. 18.A bottle has 5/7 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 2/5 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.1/2 − 4/9 =
  21. 21.Anaya has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 1/3 litre of juice. Vihaan drinks 1/7 litre. How much juice is left (in litres)? =
  23. 23.4/5 − 3/10 =
  24. 24.7/8 − 2/3 =
  25. 25.Kabir has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  27. 27.7/9 − 1/3 =
  28. 28.2/3 − 4/9 =
  29. 29.Ishaan has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  30. 30.Anaya has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  31. 31.Meera has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  32. 32.Diya has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  33. 33.2/3 − 5/9 =
  34. 34.A bottle has 4/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.7/8 − 1/2 =
  36. 36.3/4 − 2/5 =
  37. 37.3/4 − 3/7 =
  38. 38.2/3 − 3/10 =
  39. 39.Vihaan has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  40. 40.3/4 − 3/10 =

Answer key

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

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