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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 860 · 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. 1.3/8 − 1/3 =
  2. 2.A bottle has 4/9 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  4. 4.5/6 − 1/8 =
  5. 5.7/10 − 3/5 =
  6. 6.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  7. 7.5/6 − 7/10 =
  8. 8.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  9. 9.3/5 − 1/10 =
  10. 10.1/3 − 2/7 =
  11. 11.3/4 − 5/7 =
  12. 12.1/3 − 1/4 =
  13. 13.1/2 − 4/9 =
  14. 14.A bottle has 3/5 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.Meera has a ribbon 4/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  16. 16.2/3 − 2/5 =
  17. 17.A bottle has 2/3 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  18. 18.1/2 − 1/5 =
  19. 19.5/7 − 1/4 =
  20. 20.A bottle has 2/3 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 3/4 litre of juice. Tara drinks 2/7 litre. How much juice is left (in litres)? =
  22. 22.Meera has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  23. 23.Ishaan has a ribbon 5/6 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  24. 24.A bottle has 1/2 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  25. 25.4/9 − 1/6 =
  26. 26.5/6 − 1/2 =
  27. 27.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  28. 28.2/3 − 5/8 =
  29. 29.A bottle has 8/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  30. 30.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? =
  31. 31.7/9 − 1/6 =
  32. 32.A bottle has 7/10 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  33. 33.1/2 − 1/8 =
  34. 34.2/5 − 3/10 =
  35. 35.A tank is 7/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  36. 36.8/9 − 2/3 =
  37. 37.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  38. 38.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? =
  39. 39.5/8 − 1/6 =
  40. 40.5/6 − 5/9 =

Answer key

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

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