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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 144 · 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. 1.7/8 − 1/4 =
  2. 2.Riya has a ribbon 5/6 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  3. 3.1/2 − 1/10 =
  4. 4.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? =
  5. 5.3/5 − 1/3 =
  6. 6.Rohan has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 8/9 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  10. 10.5/6 − 5/8 =
  11. 11.2/5 − 3/10 =
  12. 12.8/9 − 2/3 =
  13. 13.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? =
  14. 14.Kabir has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  15. 15.2/3 − 2/9 =
  16. 16.1/2 − 3/10 =
  17. 17.4/5 − 1/6 =
  18. 18.Arjun has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 1/7 =
  20. 20.A tank is 3/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 4/9 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 4/5 litre of juice. Aarav drinks 3/4 litre. How much juice is left (in litres)? =
  23. 23.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  24. 24.2/3 − 3/7 =
  25. 25.A bottle has 5/8 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  26. 26.5/8 − 1/2 =
  27. 27.A bottle has 4/5 litre of juice. Aarav drinks 3/10 litre. How much juice is left (in litres)? =
  28. 28.7/9 − 1/2 =
  29. 29.5/6 − 1/2 =
  30. 30.9/10 − 5/6 =
  31. 31.3/4 − 1/2 =
  32. 32.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  33. 33.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  34. 34.1/2 − 1/9 =
  35. 35.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  36. 36.5/6 − 3/4 =
  37. 37.5/6 − 1/8 =
  38. 38.8/9 − 1/2 =
  39. 39.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.7/9 − 1/3 =

Answer key

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

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