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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 594 · 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.A bottle has 2/3 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 1/2 litre of juice. Vihaan drinks 3/8 litre. How much juice is left (in litres)? =
  4. 4.1/4 − 1/5 =
  5. 5.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  6. 6.A tank is 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  7. 7.Rohan has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  8. 8.5/9 − 1/3 =
  9. 9.Kabir has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  10. 10.3/4 − 1/2 =
  11. 11.8/9 − 1/3 =
  12. 12.A tank is 1/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  13. 13.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  14. 14.5/6 − 5/8 =
  15. 15.4/5 − 1/3 =
  16. 16.A tank is 7/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  17. 17.Aarav has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 2/3 litre of juice. Anaya drinks 4/7 litre. How much juice is left (in litres)? =
  19. 19.5/6 − 4/5 =
  20. 20.2/7 − 1/4 =
  21. 21.2/3 − 1/10 =
  22. 22.3/7 − 1/3 =
  23. 23.2/3 − 2/9 =
  24. 24.9/10 − 2/5 =
  25. 25.1/3 − 2/9 =
  26. 26.2/3 − 1/9 =
  27. 27.3/4 − 1/7 =
  28. 28.A bottle has 3/4 litre of juice. Anaya drinks 3/5 litre. How much juice is left (in litres)? =
  29. 29.3/4 − 1/8 =
  30. 30.Anaya has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  31. 31.7/8 − 3/4 =
  32. 32.Riya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  33. 33.Anaya has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  34. 34.3/5 − 1/4 =
  35. 35.1/2 − 2/7 =
  36. 36.2/3 − 1/5 =
  37. 37.5/7 − 1/2 =
  38. 38.6/7 − 1/2 =
  39. 39.1/4 − 1/10 =
  40. 40.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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