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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 475 · 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. 1.7/10 − 1/2 =
  2. 2.5/6 − 4/9 =
  3. 3.5/6 − 2/9 =
  4. 4.Vihaan has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  5. 5.3/4 − 3/7 =
  6. 6.A bottle has 5/7 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  7. 7.7/8 − 3/4 =
  8. 8.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? =
  9. 9.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? =
  10. 10.Sara has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  13. 13.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? =
  14. 14.1/3 − 1/5 =
  15. 15.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  16. 16.A bottle has 1/2 litre of juice. Kabir drinks 2/7 litre. How much juice is left (in litres)? =
  17. 17.Riya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  18. 18.A tank is 1/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  19. 19.2/3 − 4/9 =
  20. 20.2/5 − 1/10 =
  21. 21.1/3 − 2/9 =
  22. 22.Kabir has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 9/10 litre of juice. Riya drinks 5/6 litre. How much juice is left (in litres)? =
  24. 24.7/8 − 5/6 =
  25. 25.7/10 − 2/3 =
  26. 26.Ishaan has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  27. 27.5/7 − 1/3 =
  28. 28.Ishaan has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  29. 29.1/2 − 1/9 =
  30. 30.2/3 − 1/10 =
  31. 31.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? =
  32. 32.6/7 − 1/2 =
  33. 33.A bottle has 2/9 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.3/4 − 1/7 =
  35. 35.2/3 − 3/7 =
  36. 36.3/4 − 5/7 =
  37. 37.5/6 − 1/10 =
  38. 38.1/3 − 1/7 =
  39. 39.A bottle has 1/2 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  40. 40.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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