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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 3 · 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 − 3/10 =
  2. 2.7/8 − 1/4 =
  3. 3.A bottle has 9/10 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.1/3 − 1/5 =
  5. 5.8/9 − 1/3 =
  6. 6.A bottle has 7/10 litre of juice. Ishaan drinks 3/5 litre. How much juice is left (in litres)? =
  7. 7.8/9 − 5/6 =
  8. 8.5/6 − 1/3 =
  9. 9.Meera has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  11. 11.3/4 − 3/7 =
  12. 12.3/4 − 3/10 =
  13. 13.2/3 − 3/5 =
  14. 14.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  15. 15.7/10 − 1/5 =
  16. 16.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  17. 17.2/3 − 4/7 =
  18. 18.1/3 − 1/7 =
  19. 19.7/10 − 1/6 =
  20. 20.3/4 − 4/7 =
  21. 21.Vihaan has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  22. 22.Arjun has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  23. 23.3/5 − 1/2 =
  24. 24.4/5 − 3/10 =
  25. 25.5/7 − 2/3 =
  26. 26.Aarav has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  27. 27.6/7 − 1/4 =
  28. 28.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  29. 29.Diya has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  30. 30.Kabir has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  31. 31.3/8 − 1/3 =
  32. 32.A tank is 7/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 5/6 litre of juice. Rohan drinks 3/8 litre. How much juice is left (in litres)? =
  34. 34.5/7 − 1/4 =
  35. 35.A bottle has 9/10 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  36. 36.7/9 − 1/6 =
  37. 37.Sara has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  38. 38.3/4 − 1/8 =
  39. 39.7/9 − 1/3 =
  40. 40.3/4 − 5/8 =

Answer key

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

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