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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 601 · 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. 1.1/3 − 2/7 =
  2. 2.A bottle has 2/3 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  3. 3.2/3 − 4/7 =
  4. 4.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  5. 5.A bottle has 7/10 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  6. 6.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  7. 7.4/5 − 1/3 =
  8. 8.3/4 − 1/8 =
  9. 9.A bottle has 1/2 litre of juice. Diya drinks 3/8 litre. How much juice is left (in litres)? =
  10. 10.7/8 − 1/3 =
  11. 11.5/6 − 3/5 =
  12. 12.Tara has a ribbon 7/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  13. 13.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  14. 14.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? =
  15. 15.3/4 − 3/5 =
  16. 16.3/4 − 2/5 =
  17. 17.2/3 − 1/4 =
  18. 18.7/8 − 3/4 =
  19. 19.4/5 − 1/6 =
  20. 20.A bottle has 3/4 litre of juice. Tara drinks 1/7 litre. How much juice is left (in litres)? =
  21. 21.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  22. 22.5/6 − 1/3 =
  23. 23.3/7 − 1/3 =
  24. 24.A tank is 5/6 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  25. 25.2/3 − 3/8 =
  26. 26.6/7 − 1/2 =
  27. 27.Ishaan has a ribbon 5/6 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  28. 28.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.5/6 − 5/8 =
  30. 30.7/9 − 1/3 =
  31. 31.A tank is 9/10 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  32. 32.1/3 − 1/7 =
  33. 33.3/8 − 1/3 =
  34. 34.5/7 − 1/2 =
  35. 35.5/8 − 1/6 =
  36. 36.1/4 − 1/5 =
  37. 37.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  38. 38.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? =
  39. 39.1/3 − 1/9 =
  40. 40.3/10 − 1/5 =

Answer key

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

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