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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 995 · 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. 1.9/10 − 1/3 =
  2. 2.Rohan has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 9/10 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.Tara has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  5. 5.1/2 − 1/9 =
  6. 6.9/10 − 4/5 =
  7. 7.A bottle has 1/2 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  8. 8.2/3 − 1/8 =
  9. 9.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  10. 10.Tara has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  11. 11.3/7 − 1/3 =
  12. 12.2/3 − 1/9 =
  13. 13.Anaya has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  14. 14.1/2 − 3/10 =
  15. 15.7/9 − 1/6 =
  16. 16.2/3 − 4/9 =
  17. 17.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  18. 18.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  19. 19.3/10 − 1/5 =
  20. 20.5/6 − 1/5 =
  21. 21.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/3 − 1/5 =
  23. 23.8/9 − 1/6 =
  24. 24.A bottle has 3/4 litre of juice. Arjun drinks 4/7 litre. How much juice is left (in litres)? =
  25. 25.Arjun has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  26. 26.3/4 − 5/7 =
  27. 27.1/5 − 1/6 =
  28. 28.3/5 − 3/10 =
  29. 29.5/8 − 1/2 =
  30. 30.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.4/5 − 1/10 =
  32. 32.5/6 − 7/9 =
  33. 33.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 1/3 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  35. 35.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  36. 36.3/5 − 1/6 =
  37. 37.7/8 − 5/6 =
  38. 38.7/9 − 1/3 =
  39. 39.1/3 − 1/10 =
  40. 40.5/6 − 5/8 =

Answer key

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

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