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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 654 · 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. 1.2/3 − 1/9 =
  2. 2.3/5 − 1/10 =
  3. 3.Anaya has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  4. 4.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  5. 5.Kabir has a ribbon 3/4 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  6. 6.7/10 − 2/5 =
  7. 7.Rohan has a ribbon 3/4 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  8. 8.5/6 − 4/5 =
  9. 9.2/5 − 3/10 =
  10. 10.4/5 − 3/4 =
  11. 11.2/3 − 1/7 =
  12. 12.5/6 − 5/8 =
  13. 13.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.6/7 − 1/4 =
  15. 15.A bottle has 4/7 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  17. 17.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? =
  18. 18.3/10 − 1/5 =
  19. 19.7/8 − 1/4 =
  20. 20.A bottle has 2/5 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  21. 21.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  22. 22.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  23. 23.Kabir has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  24. 24.2/3 − 2/5 =
  25. 25.5/7 − 2/3 =
  26. 26.Diya has a ribbon 2/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  27. 27.A bottle has 5/8 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  28. 28.2/3 − 2/9 =
  29. 29.7/8 − 2/3 =
  30. 30.Diya has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  31. 31.1/2 − 1/7 =
  32. 32.Aarav has a ribbon 3/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  33. 33.Vihaan has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  34. 34.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 8/9 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 7/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 8/9 litre of juice. Diya drinks 5/6 litre. How much juice is left (in litres)? =
  39. 39.Diya has a ribbon 5/6 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  40. 40.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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