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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 62 · 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 1/2 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  2. 2.Kabir has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  3. 3.4/5 − 2/3 =
  4. 4.2/3 − 3/7 =
  5. 5.4/7 − 1/4 =
  6. 6.3/4 − 4/7 =
  7. 7.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  8. 8.1/2 − 2/9 =
  9. 9.1/3 − 1/7 =
  10. 10.7/9 − 2/3 =
  11. 11.2/3 − 2/9 =
  12. 12.9/10 − 3/5 =
  13. 13.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  14. 14.Sara has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  15. 15.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? =
  16. 16.A bottle has 7/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  17. 17.1/2 − 4/9 =
  18. 18.A bottle has 5/6 litre of juice. Sara drinks 3/4 litre. How much juice is left (in litres)? =
  19. 19.5/6 − 3/5 =
  20. 20.A bottle has 5/8 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.6/7 − 1/4 =
  22. 22.A bottle has 2/3 litre of juice. Anaya drinks 4/7 litre. How much juice is left (in litres)? =
  23. 23.7/8 − 1/6 =
  24. 24.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 3/4 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  26. 26.2/3 − 1/5 =
  27. 27.A bottle has 1/6 litre of juice. Sara drinks 1/8 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 2/3 litre of juice. Tara drinks 3/5 litre. How much juice is left (in litres)? =
  29. 29.5/7 − 1/3 =
  30. 30.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  31. 31.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? =
  32. 32.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 4/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 1/2 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  36. 36.A tank is 1/2 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  39. 39.3/4 − 2/5 =
  40. 40.A bottle has 2/7 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =

Answer key

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

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