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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 317 · 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. 1.3/4 − 5/7 =
  2. 2.4/9 − 1/6 =
  3. 3.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 3/8 =
  5. 5.9/10 − 4/5 =
  6. 6.A bottle has 2/3 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 3/4 litre of juice. Aarav drinks 5/8 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 7/10 litre of juice. Sara drinks 2/5 litre. How much juice is left (in litres)? =
  9. 9.5/6 − 5/8 =
  10. 10.8/9 − 2/3 =
  11. 11.4/7 − 1/2 =
  12. 12.A bottle has 1/6 litre of juice. Rohan drinks 1/8 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 1/2 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =
  14. 14.Tara has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  15. 15.7/8 − 3/4 =
  16. 16.Anaya has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  17. 17.7/10 − 1/4 =
  18. 18.5/9 − 1/2 =
  19. 19.Tara has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  20. 20.3/4 − 1/7 =
  21. 21.5/7 − 2/3 =
  22. 22.A bottle has 4/5 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  23. 23.1/3 − 1/8 =
  24. 24.5/6 − 7/9 =
  25. 25.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  26. 26.4/5 − 7/10 =
  27. 27.Aarav has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  28. 28.7/8 − 1/3 =
  29. 29.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? =
  30. 30.8/9 − 1/2 =
  31. 31.5/6 − 3/10 =
  32. 32.7/10 − 1/5 =
  33. 33.4/7 − 1/4 =
  34. 34.Aarav has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  35. 35.A bottle has 1/2 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  37. 37.Riya has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  38. 38.9/10 − 1/5 =
  39. 39.3/4 − 1/6 =
  40. 40.5/9 − 1/6 =

Answer key

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

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