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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 168 · 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. 1.3/10 − 1/5 =
  2. 2.Ishaan has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  3. 3.1/3 − 2/7 =
  4. 4.3/4 − 2/3 =
  5. 5.9/10 − 3/5 =
  6. 6.2/3 − 3/5 =
  7. 7.Ishaan has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  8. 8.6/7 − 1/3 =
  9. 9.2/3 − 5/8 =
  10. 10.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  11. 11.1/5 − 1/10 =
  12. 12.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  13. 13.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? =
  14. 14.2/5 − 1/4 =
  15. 15.Aarav has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  16. 16.9/10 − 1/4 =
  17. 17.A bottle has 4/7 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.3/5 − 1/3 =
  19. 19.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  20. 20.7/9 − 2/3 =
  21. 21.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  22. 22.2/3 − 5/9 =
  23. 23.Tara has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  24. 24.7/10 − 2/5 =
  25. 25.5/6 − 1/5 =
  26. 26.3/4 − 3/7 =
  27. 27.A bottle has 1/2 litre of juice. Arjun drinks 2/5 litre. How much juice is left (in litres)? =
  28. 28.5/6 − 4/9 =
  29. 29.4/5 − 1/10 =
  30. 30.A tank is 9/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  31. 31.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  32. 32.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  33. 33.Aarav has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  34. 34.1/6 − 1/9 =
  35. 35.1/3 − 1/4 =
  36. 36.Diya has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 5/6 litre of juice. Diya drinks 5/8 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 5/6 litre of juice. Diya drinks 3/5 litre. How much juice is left (in litres)? =
  39. 39.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  40. 40.A bottle has 8/9 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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