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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 819 · 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. 1.7/9 − 1/6 =
  2. 2.A bottle has 9/10 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  3. 3.5/6 − 2/3 =
  4. 4.7/10 − 1/5 =
  5. 5.8/9 − 2/3 =
  6. 6.2/7 − 1/4 =
  7. 7.2/3 − 1/7 =
  8. 8.A bottle has 9/10 litre of juice. Vihaan drinks 5/6 litre. How much juice is left (in litres)? =
  9. 9.Rohan has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 1/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  11. 11.A bottle has 1/3 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  12. 12.A tank is 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.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? =
  14. 14.Ishaan has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.Aarav has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 5/9 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  18. 18.4/5 − 2/3 =
  19. 19.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  20. 20.5/7 − 1/2 =
  21. 21.1/5 − 1/10 =
  22. 22.5/6 − 4/9 =
  23. 23.6/7 − 1/4 =
  24. 24.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  25. 25.2/3 − 4/9 =
  26. 26.A bottle has 2/3 litre of juice. Diya drinks 3/8 litre. How much juice is left (in litres)? =
  27. 27.7/9 − 1/2 =
  28. 28.5/6 − 1/9 =
  29. 29.7/10 − 1/4 =
  30. 30.A bottle has 7/10 litre of juice. Ishaan drinks 3/5 litre. How much juice is left (in litres)? =
  31. 31.A bottle has 7/10 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.1/2 − 2/9 =
  33. 33.7/10 − 2/3 =
  34. 34.3/4 − 1/2 =
  35. 35.4/9 − 1/6 =
  36. 36.A bottle has 3/4 litre of juice. Tara drinks 1/7 litre. How much juice is left (in litres)? =
  37. 37.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 1/4 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  39. 39.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  40. 40.1/6 − 1/10 =

Answer key

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

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