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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 773 · 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. 1.8/9 − 1/6 =
  2. 2.4/5 − 3/10 =
  3. 3.2/3 − 3/8 =
  4. 4.Ishaan has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  5. 5.A bottle has 1/3 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  6. 6.Rohan has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 4/7 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.7/9 − 2/3 =
  9. 9.7/8 − 2/3 =
  10. 10.5/6 − 4/9 =
  11. 11.9/10 − 1/4 =
  12. 12.3/4 − 1/5 =
  13. 13.9/10 − 1/5 =
  14. 14.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  15. 15.Tara has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 6/7 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.1/2 − 2/7 =
  18. 18.1/3 − 1/7 =
  19. 19.A bottle has 2/3 litre of juice. Anaya drinks 1/8 litre. How much juice is left (in litres)? =
  20. 20.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 7/10 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.1/2 − 1/7 =
  23. 23.2/5 − 1/10 =
  24. 24.Tara has a ribbon 9/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  25. 25.1/3 − 1/8 =
  26. 26.3/8 − 1/3 =
  27. 27.4/5 − 2/3 =
  28. 28.4/5 − 1/4 =
  29. 29.A bottle has 1/3 litre of juice. Aarav drinks 2/9 litre. How much juice is left (in litres)? =
  30. 30.Arjun has a ribbon 5/6 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 8/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.8/9 − 5/6 =
  33. 33.4/5 − 7/10 =
  34. 34.Riya has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  35. 35.5/7 − 1/2 =
  36. 36.3/5 − 1/4 =
  37. 37.1/2 − 2/9 =
  38. 38.5/6 − 1/9 =
  39. 39.3/4 − 1/7 =
  40. 40.2/5 − 3/10 =

Answer key

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

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