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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 24 · 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. 1.4/9 − 1/3 =
  2. 2.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  3. 3.8/9 − 1/3 =
  4. 4.7/8 − 1/2 =
  5. 5.2/3 − 1/9 =
  6. 6.A bottle has 4/7 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  7. 7.1/4 − 1/8 =
  8. 8.1/4 − 1/7 =
  9. 9.8/9 − 1/2 =
  10. 10.1/2 − 1/5 =
  11. 11.5/7 − 2/3 =
  12. 12.6/7 − 3/4 =
  13. 13.A bottle has 4/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 5/7 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  15. 15.A tank is 9/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  16. 16.5/6 − 5/9 =
  17. 17.9/10 − 1/4 =
  18. 18.1/6 − 1/9 =
  19. 19.7/8 − 1/4 =
  20. 20.1/2 − 3/7 =
  21. 21.A bottle has 5/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  22. 22.5/6 − 7/9 =
  23. 23.3/5 − 1/3 =
  24. 24.3/4 − 3/7 =
  25. 25.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.9/10 − 1/2 =
  27. 27.A bottle has 9/10 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  28. 28.A tank is 1/2 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  29. 29.3/10 − 1/6 =
  30. 30.A tank is 1/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 2/5 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  32. 32.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.Tara has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 5/9 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 5/6 litre of juice. Arjun drinks 5/9 litre. How much juice is left (in litres)? =
  36. 36.1/3 − 1/4 =
  37. 37.2/3 − 1/4 =
  38. 38.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? =
  39. 39.8/9 − 2/3 =
  40. 40.Sara has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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