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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 187 · 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 tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  2. 2.3/5 − 1/6 =
  3. 3.4/7 − 1/3 =
  4. 4.2/3 − 1/10 =
  5. 5.1/5 − 1/10 =
  6. 6.Sara has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  7. 7.Sara has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  8. 8.Riya has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  9. 9.1/2 − 1/10 =
  10. 10.2/9 − 1/6 =
  11. 11.2/3 − 3/5 =
  12. 12.7/10 − 1/6 =
  13. 13.1/2 − 4/9 =
  14. 14.5/7 − 1/4 =
  15. 15.7/8 − 2/3 =
  16. 16.2/3 − 3/10 =
  17. 17.5/8 − 1/6 =
  18. 18.2/3 − 3/7 =
  19. 19.7/10 − 1/3 =
  20. 20.A bottle has 1/3 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  21. 21.1/6 − 1/8 =
  22. 22.9/10 − 2/5 =
  23. 23.1/2 − 2/9 =
  24. 24.Tara has a ribbon 4/5 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  25. 25.1/5 − 1/6 =
  26. 26.2/5 − 3/10 =
  27. 27.Aarav has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  28. 28.Kabir has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  29. 29.4/5 − 3/10 =
  30. 30.Kabir has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  31. 31.Anaya has a ribbon 1/2 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  32. 32.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.2/3 − 1/9 =
  34. 34.3/4 − 3/5 =
  35. 35.A bottle has 5/6 litre of juice. Tara drinks 5/9 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 5/6 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  37. 37.Rohan has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  38. 38.6/7 − 1/4 =
  39. 39.Riya has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  40. 40.Vihaan has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =

Answer key

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

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