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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 142 · 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.A tank is 7/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  2. 2.7/8 − 1/6 =
  3. 3.A bottle has 9/10 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  4. 4.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? =
  5. 5.A bottle has 5/8 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.Meera has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  7. 7.4/5 − 3/4 =
  8. 8.7/9 − 1/3 =
  9. 9.Anaya has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  10. 10.1/3 − 1/4 =
  11. 11.A bottle has 3/4 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  12. 12.1/2 − 1/8 =
  13. 13.4/7 − 1/2 =
  14. 14.5/6 − 2/5 =
  15. 15.A bottle has 7/9 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 3/4 litre of juice. Aarav drinks 3/10 litre. How much juice is left (in litres)? =
  17. 17.2/3 − 4/9 =
  18. 18.2/5 − 1/10 =
  19. 19.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  20. 20.Kabir has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  21. 21.Riya has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  22. 22.3/5 − 1/4 =
  23. 23.3/4 − 1/2 =
  24. 24.4/7 − 1/3 =
  25. 25.3/8 − 1/4 =
  26. 26.A bottle has 1/4 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  27. 27.Vihaan has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 5/6 litre of juice. Anaya drinks 1/9 litre. How much juice is left (in litres)? =
  29. 29.7/8 − 3/4 =
  30. 30.7/9 − 2/3 =
  31. 31.1/3 − 2/7 =
  32. 32.5/6 − 1/8 =
  33. 33.2/3 − 5/9 =
  34. 34.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  35. 35.3/4 − 4/7 =
  36. 36.5/6 − 7/10 =
  37. 37.9/10 − 1/3 =
  38. 38.3/4 − 1/6 =
  39. 39.2/5 − 1/6 =
  40. 40.A tank is 5/6 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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