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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 942 · 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 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  2. 2.2/9 − 1/6 =
  3. 3.6/7 − 1/4 =
  4. 4.8/9 − 5/6 =
  5. 5.5/8 − 1/4 =
  6. 6.3/4 − 1/8 =
  7. 7.5/7 − 1/4 =
  8. 8.5/6 − 5/8 =
  9. 9.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  10. 10.Riya has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  11. 11.A bottle has 8/9 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  12. 12.8/9 − 2/3 =
  13. 13.A tank is 5/6 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.5/7 − 1/3 =
  15. 15.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.A bottle has 5/8 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  17. 17.3/4 − 4/7 =
  18. 18.Kabir has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.1/5 − 1/10 =
  21. 21.Diya has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  22. 22.2/3 − 5/9 =
  23. 23.A bottle has 1/2 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  24. 24.9/10 − 2/5 =
  25. 25.Rohan has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/3 − 1/7 =
  28. 28.5/6 − 1/9 =
  29. 29.3/7 − 1/3 =
  30. 30.3/5 − 1/3 =
  31. 31.Diya has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  32. 32.A bottle has 1/2 litre of juice. Kabir drinks 2/7 litre. How much juice is left (in litres)? =
  33. 33.5/9 − 1/3 =
  34. 34.A bottle has 9/10 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 5/6 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  36. 36.1/2 − 1/7 =
  37. 37.A tank is 5/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  38. 38.3/4 − 3/7 =
  39. 39.Diya has a ribbon 7/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 1/2 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =

Answer key

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

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