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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 282 · 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 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  2. 2.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  3. 3.A bottle has 1/2 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 4/7 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.7/8 − 5/6 =
  6. 6.9/10 − 1/5 =
  7. 7.7/8 − 1/4 =
  8. 8.A bottle has 2/3 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  9. 9.4/7 − 1/2 =
  10. 10.Riya has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  11. 11.3/4 − 1/7 =
  12. 12.A bottle has 9/10 litre of juice. Meera drinks 2/5 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 1/2 litre of juice. Tara drinks 2/7 litre. How much juice is left (in litres)? =
  14. 14.4/5 − 1/3 =
  15. 15.9/10 − 2/3 =
  16. 16.A bottle has 6/7 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  17. 17.2/3 − 1/6 =
  18. 18.7/9 − 2/3 =
  19. 19.A tank is 5/6 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  20. 20.9/10 − 1/6 =
  21. 21.Ishaan has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  22. 22.1/2 − 3/8 =
  23. 23.Ishaan has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  24. 24.7/10 − 2/5 =
  25. 25.1/4 − 1/10 =
  26. 26.8/9 − 2/3 =
  27. 27.1/2 − 2/5 =
  28. 28.A bottle has 1/2 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  29. 29.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  30. 30.Rohan has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  31. 31.3/4 − 4/7 =
  32. 32.1/3 − 1/9 =
  33. 33.Aarav has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.7/9 − 1/6 =
  35. 35.1/6 − 1/10 =
  36. 36.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  37. 37.1/2 − 1/3 =
  38. 38.4/9 − 1/3 =
  39. 39.1/5 − 1/6 =
  40. 40.3/4 − 1/5 =

Answer key

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

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