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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 465 · 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. 1.1/2 − 3/7 =
  2. 2.3/5 − 1/3 =
  3. 3.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? =
  4. 4.2/3 − 5/8 =
  5. 5.5/9 − 1/2 =
  6. 6.9/10 − 4/5 =
  7. 7.A tank is 1/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  8. 8.1/2 − 2/5 =
  9. 9.5/9 − 1/6 =
  10. 10.1/6 − 1/9 =
  11. 11.4/5 − 1/10 =
  12. 12.7/9 − 1/6 =
  13. 13.A bottle has 9/10 litre of juice. Riya drinks 4/5 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 3/4 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 7/10 =
  16. 16.A bottle has 4/7 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  17. 17.A bottle has 5/6 litre of juice. Rohan drinks 5/8 litre. How much juice is left (in litres)? =
  18. 18.Anaya has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  20. 20.Ishaan has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  21. 21.2/5 − 1/4 =
  22. 22.A bottle has 6/7 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  23. 23.5/8 − 1/3 =
  24. 24.Riya has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  25. 25.A bottle has 7/8 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  26. 26.2/3 − 2/9 =
  27. 27.9/10 − 1/3 =
  28. 28.9/10 − 1/6 =
  29. 29.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  30. 30.5/6 − 1/10 =
  31. 31.7/10 − 1/6 =
  32. 32.5/6 − 5/9 =
  33. 33.7/9 − 1/2 =
  34. 34.5/8 − 1/6 =
  35. 35.Meera has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  36. 36.3/10 − 1/5 =
  37. 37.3/5 − 1/4 =
  38. 38.Meera has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.8/9 − 1/2 =
  40. 40.4/5 − 2/3 =

Answer key

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

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