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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 610 · 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.Meera has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  2. 2.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  3. 3.3/4 − 3/7 =
  4. 4.2/3 − 3/8 =
  5. 5.3/4 − 1/7 =
  6. 6.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 1/2 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 5/9 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  9. 9.5/9 − 1/3 =
  10. 10.7/10 − 1/2 =
  11. 11.A tank is 1/2 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  12. 12.1/4 − 1/6 =
  13. 13.A bottle has 7/8 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 2/5 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  15. 15.8/9 − 1/3 =
  16. 16.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.1/3 − 1/9 =
  18. 18.Anaya has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  19. 19.Kabir has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  20. 20.4/7 − 1/4 =
  21. 21.9/10 − 1/5 =
  22. 22.2/5 − 1/10 =
  23. 23.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 7/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  25. 25.Riya has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  26. 26.7/8 − 3/4 =
  27. 27.Arjun has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  28. 28.1/2 − 1/9 =
  29. 29.3/5 − 1/3 =
  30. 30.9/10 − 1/6 =
  31. 31.1/4 − 1/7 =
  32. 32.A tank is 1/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  33. 33.5/6 − 5/9 =
  34. 34.A bottle has 9/10 litre of juice. Tara drinks 4/5 litre. How much juice is left (in litres)? =
  35. 35.5/6 − 5/8 =
  36. 36.A bottle has 3/10 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  37. 37.7/8 − 1/6 =
  38. 38.3/5 − 3/10 =
  39. 39.3/5 − 1/4 =
  40. 40.Tara has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =

Answer key

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

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