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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 730 · 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.Anaya has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.5/6 − 3/5 =
  3. 3.3/4 − 4/7 =
  4. 4.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  5. 5.1/5 − 1/10 =
  6. 6.3/4 − 2/3 =
  7. 7.3/4 − 3/10 =
  8. 8.9/10 − 5/6 =
  9. 9.A bottle has 7/8 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  10. 10.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  11. 11.4/5 − 1/4 =
  12. 12.Arjun has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  13. 13.Vihaan has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  14. 14.6/7 − 2/3 =
  15. 15.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? =
  16. 16.A tank is 1/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  17. 17.3/10 − 1/5 =
  18. 18.4/5 − 1/6 =
  19. 19.Vihaan has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  20. 20.7/10 − 2/3 =
  21. 21.7/8 − 1/3 =
  22. 22.1/6 − 1/8 =
  23. 23.A bottle has 1/3 litre of juice. Aarav drinks 2/9 litre. How much juice is left (in litres)? =
  24. 24.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  25. 25.5/6 − 4/9 =
  26. 26.2/3 − 4/7 =
  27. 27.2/3 − 1/4 =
  28. 28.1/2 − 1/9 =
  29. 29.Meera has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  30. 30.1/2 − 1/4 =
  31. 31.1/4 − 1/8 =
  32. 32.A bottle has 2/3 litre of juice. Kabir drinks 4/7 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 2/3 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  34. 34.2/5 − 3/10 =
  35. 35.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  36. 36.1/3 − 1/5 =
  37. 37.2/3 − 5/8 =
  38. 38.2/3 − 1/7 =
  39. 39.A tank is 3/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.A bottle has 5/6 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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