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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 105 · 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. 1.7/8 − 3/4 =
  2. 2.3/5 − 3/10 =
  3. 3.A bottle has 3/7 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.Rohan has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  5. 5.1/4 − 1/10 =
  6. 6.A bottle has 2/3 litre of juice. Riya drinks 2/5 litre. How much juice is left (in litres)? =
  7. 7.1/2 − 1/6 =
  8. 8.A bottle has 2/3 litre of juice. Rohan drinks 2/5 litre. How much juice is left (in litres)? =
  9. 9.Aarav has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  10. 10.2/5 − 3/10 =
  11. 11.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  12. 12.5/6 − 2/3 =
  13. 13.9/10 − 1/3 =
  14. 14.7/8 − 1/2 =
  15. 15.Sara has a ribbon 7/8 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 3/5 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  17. 17.7/10 − 3/5 =
  18. 18.Riya has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  19. 19.4/7 − 1/2 =
  20. 20.A bottle has 2/3 litre of juice. Vihaan drinks 4/7 litre. How much juice is left (in litres)? =
  21. 21.5/6 − 3/10 =
  22. 22.5/9 − 1/3 =
  23. 23.1/6 − 1/9 =
  24. 24.5/6 − 3/8 =
  25. 25.9/10 − 4/5 =
  26. 26.4/7 − 1/4 =
  27. 27.3/5 − 1/4 =
  28. 28.A bottle has 3/5 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  29. 29.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.7/8 − 1/4 =
  31. 31.2/5 − 1/10 =
  32. 32.5/6 − 3/5 =
  33. 33.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  34. 34.3/10 − 1/6 =
  35. 35.4/5 − 1/6 =
  36. 36.1/4 − 1/8 =
  37. 37.2/3 − 3/5 =
  38. 38.A bottle has 4/7 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.Ishaan has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  40. 40.Meera has a ribbon 1/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =

Answer key

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

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