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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 98 · 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 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 3/4 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  3. 3.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? =
  4. 4.1/2 − 1/9 =
  5. 5.6/7 − 3/4 =
  6. 6.2/3 − 3/10 =
  7. 7.9/10 − 2/5 =
  8. 8.3/4 − 1/6 =
  9. 9.3/4 − 5/8 =
  10. 10.5/6 − 5/9 =
  11. 11.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  12. 12.3/4 − 1/7 =
  13. 13.5/6 − 3/5 =
  14. 14.5/7 − 1/3 =
  15. 15.A bottle has 7/8 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  16. 16.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? =
  17. 17.6/7 − 1/2 =
  18. 18.5/6 − 7/9 =
  19. 19.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  20. 20.5/7 − 2/3 =
  21. 21.1/3 − 1/10 =
  22. 22.Kabir has a ribbon 2/3 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  23. 23.1/3 − 1/5 =
  24. 24.2/3 − 2/5 =
  25. 25.7/8 − 5/6 =
  26. 26.1/2 − 4/9 =
  27. 27.A bottle has 1/2 litre of juice. Vihaan drinks 3/7 litre. How much juice is left (in litres)? =
  28. 28.2/3 − 2/9 =
  29. 29.2/3 − 4/9 =
  30. 30.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? =
  31. 31.3/4 − 5/7 =
  32. 32.A bottle has 1/2 litre of juice. Rohan drinks 1/5 litre. How much juice is left (in litres)? =
  33. 33.Vihaan has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  34. 34.4/5 − 3/4 =
  35. 35.A bottle has 5/6 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  36. 36.1/3 − 2/7 =
  37. 37.8/9 − 5/6 =
  38. 38.A bottle has 4/5 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  39. 39.A bottle has 7/9 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.1/3 − 1/8 =

Answer key

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

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