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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 157 · 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 1/3 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  2. 2.2/3 − 2/5 =
  3. 3.5/6 − 4/5 =
  4. 4.5/6 − 2/9 =
  5. 5.1/2 − 1/9 =
  6. 6.5/9 − 1/3 =
  7. 7.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  8. 8.4/7 − 1/4 =
  9. 9.1/3 − 1/7 =
  10. 10.A bottle has 1/3 litre of juice. Kabir drinks 2/7 litre. How much juice is left (in litres)? =
  11. 11.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? =
  12. 12.7/8 − 1/4 =
  13. 13.Riya has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  14. 14.7/10 − 1/2 =
  15. 15.8/9 − 2/3 =
  16. 16.A bottle has 3/4 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  17. 17.Ishaan has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 1/2 litre of juice. Rohan drinks 4/9 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 6/7 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  20. 20.7/9 − 1/6 =
  21. 21.A bottle has 5/6 litre of juice. Diya drinks 3/10 litre. How much juice is left (in litres)? =
  22. 22.5/6 − 2/5 =
  23. 23.3/4 − 2/7 =
  24. 24.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? =
  25. 25.A bottle has 5/7 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  26. 26.1/2 − 2/7 =
  27. 27.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? =
  28. 28.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  29. 29.A bottle has 3/5 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.2/3 − 1/7 =
  31. 31.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 3/7 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  34. 34.5/9 − 1/2 =
  35. 35.A bottle has 6/7 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  36. 36.4/9 − 1/3 =
  37. 37.3/4 − 4/7 =
  38. 38.2/5 − 3/10 =
  39. 39.A bottle has 3/4 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  40. 40.1/4 − 1/5 =

Answer key

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

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