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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 191 · 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. 1.4/5 − 1/10 =
  2. 2.7/8 − 1/6 =
  3. 3.Aarav has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  4. 4.7/10 − 2/5 =
  5. 5.7/9 − 2/3 =
  6. 6.1/2 − 3/7 =
  7. 7.1/3 − 1/5 =
  8. 8.1/4 − 1/7 =
  9. 9.3/4 − 1/2 =
  10. 10.3/5 − 3/10 =
  11. 11.7/9 − 1/6 =
  12. 12.A bottle has 5/6 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  13. 13.Meera has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  14. 14.2/3 − 2/9 =
  15. 15.2/3 − 1/10 =
  16. 16.2/3 − 1/5 =
  17. 17.Vihaan has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  18. 18.1/3 − 1/9 =
  19. 19.3/8 − 1/4 =
  20. 20.2/3 − 4/9 =
  21. 21.Arjun has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  22. 22.1/3 − 1/7 =
  23. 23.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  24. 24.3/4 − 4/7 =
  25. 25.A bottle has 1/4 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  26. 26.5/6 − 1/2 =
  27. 27.2/3 − 1/8 =
  28. 28.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  29. 29.A bottle has 8/9 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  30. 30.2/5 − 1/4 =
  31. 31.Rohan has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  32. 32.6/7 − 3/4 =
  33. 33.A bottle has 1/2 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =
  34. 34.5/7 − 1/4 =
  35. 35.3/4 − 1/7 =
  36. 36.8/9 − 1/6 =
  37. 37.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 5/8 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.1/2 − 4/9 =
  40. 40.2/3 − 2/7 =

Answer key

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

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