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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 763 · 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. 1.5/8 − 1/4 =
  2. 2.A tank is 5/6 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  3. 3.2/3 − 1/9 =
  4. 4.6/7 − 1/2 =
  5. 5.4/7 − 1/2 =
  6. 6.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  7. 7.2/5 − 1/10 =
  8. 8.Meera has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  9. 9.5/6 − 1/9 =
  10. 10.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  11. 11.Diya has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  12. 12.1/3 − 1/4 =
  13. 13.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  14. 14.1/2 − 1/7 =
  15. 15.1/3 − 1/5 =
  16. 16.Riya has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  17. 17.6/7 − 3/4 =
  18. 18.A bottle has 5/6 litre of juice. Diya drinks 5/8 litre. How much juice is left (in litres)? =
  19. 19.2/3 − 1/2 =
  20. 20.A bottle has 4/9 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  21. 21.2/7 − 1/4 =
  22. 22.A bottle has 2/3 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  23. 23.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  24. 24.Kabir has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  25. 25.Kabir has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  26. 26.2/5 − 1/4 =
  27. 27.7/10 − 2/3 =
  28. 28.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? =
  29. 29.A bottle has 7/10 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.7/8 − 1/4 =
  31. 31.2/3 − 1/4 =
  32. 32.2/3 − 2/5 =
  33. 33.4/5 − 1/4 =
  34. 34.1/6 − 1/8 =
  35. 35.5/7 − 1/3 =
  36. 36.3/4 − 4/7 =
  37. 37.A tank is 1/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.Aarav has a ribbon 2/3 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 4/9 =
  40. 40.9/10 − 2/3 =

Answer key

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

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