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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 219 · 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 bottle has 7/8 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  2. 2.2/3 − 3/7 =
  3. 3.Meera has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  4. 4.Aarav has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  5. 5.1/3 − 1/8 =
  6. 6.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  7. 7.1/4 − 1/5 =
  8. 8.9/10 − 3/5 =
  9. 9.5/7 − 1/4 =
  10. 10.3/4 − 3/10 =
  11. 11.2/3 − 4/9 =
  12. 12.A bottle has 1/4 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  13. 13.4/9 − 1/3 =
  14. 14.8/9 − 1/2 =
  15. 15.6/7 − 1/2 =
  16. 16.A bottle has 1/2 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  17. 17.Sara has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  18. 18.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? =
  19. 19.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  20. 20.3/4 − 2/5 =
  21. 21.7/10 − 1/5 =
  22. 22.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/8 − 1/3 =
  24. 24.5/6 − 4/9 =
  25. 25.3/8 − 1/4 =
  26. 26.3/4 − 2/7 =
  27. 27.A tank is 2/3 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  28. 28.1/2 − 4/9 =
  29. 29.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  30. 30.7/8 − 1/4 =
  31. 31.8/9 − 5/6 =
  32. 32.5/6 − 5/8 =
  33. 33.A bottle has 5/6 litre of juice. Arjun drinks 2/9 litre. How much juice is left (in litres)? =
  34. 34.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  35. 35.3/5 − 1/6 =
  36. 36.A tank is 4/9 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 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  38. 38.1/3 − 1/4 =
  39. 39.A bottle has 7/9 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 2/3 litre of juice. Sara drinks 2/9 litre. How much juice is left (in litres)? =

Answer key

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

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