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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 499 · 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. 1.5/6 − 1/5 =
  2. 2.1/4 − 1/6 =
  3. 3.1/2 − 2/7 =
  4. 4.9/10 − 1/3 =
  5. 5.A bottle has 7/9 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  7. 7.2/3 − 1/9 =
  8. 8.6/7 − 1/2 =
  9. 9.3/7 − 1/3 =
  10. 10.6/7 − 1/3 =
  11. 11.4/5 − 3/4 =
  12. 12.4/5 − 2/3 =
  13. 13.3/4 − 1/8 =
  14. 14.8/9 − 2/3 =
  15. 15.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  17. 17.Diya has a ribbon 4/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  18. 18.3/5 − 3/10 =
  19. 19.3/4 − 5/8 =
  20. 20.1/4 − 1/7 =
  21. 21.9/10 − 4/5 =
  22. 22.A bottle has 3/4 litre of juice. Tara drinks 3/8 litre. How much juice is left (in litres)? =
  23. 23.1/4 − 1/10 =
  24. 24.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  25. 25.4/5 − 1/2 =
  26. 26.4/7 − 1/3 =
  27. 27.2/3 − 3/5 =
  28. 28.A bottle has 4/5 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  29. 29.3/5 − 1/3 =
  30. 30.Rohan has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 6/7 litre of juice. Riya drinks 3/4 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 3/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 7/10 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  34. 34.Tara has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  35. 35.Ishaan has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 1/6 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  37. 37.1/3 − 1/4 =
  38. 38.8/9 − 1/3 =
  39. 39.Rohan has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  40. 40.Kabir has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =

Answer key

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

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