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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 1 · 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. 1.2/3 − 1/8 =
  2. 2.7/10 − 1/3 =
  3. 3.2/5 − 1/10 =
  4. 4.Meera has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  5. 5.6/7 − 3/4 =
  6. 6.5/6 − 1/8 =
  7. 7.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.9/10 − 1/2 =
  9. 9.6/7 − 1/2 =
  10. 10.Tara has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  11. 11.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? =
  12. 12.2/5 − 1/6 =
  13. 13.A bottle has 5/7 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.1/2 − 3/7 =
  15. 15.A bottle has 9/10 litre of juice. Anaya drinks 3/4 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 3/4 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  17. 17.4/5 − 3/4 =
  18. 18.Diya has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  21. 21.5/7 − 1/3 =
  22. 22.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? =
  23. 23.5/6 − 3/4 =
  24. 24.4/5 − 1/2 =
  25. 25.3/4 − 7/10 =
  26. 26.Vihaan has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  27. 27.5/9 − 1/6 =
  28. 28.2/5 − 1/4 =
  29. 29.1/2 − 3/8 =
  30. 30.5/7 − 2/3 =
  31. 31.2/3 − 3/5 =
  32. 32.3/4 − 2/7 =
  33. 33.Tara has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 5/6 litre of juice. Riya drinks 2/9 litre. How much juice is left (in litres)? =
  35. 35.3/7 − 1/4 =
  36. 36.5/7 − 1/4 =
  37. 37.Meera has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  38. 38.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? =
  39. 39.Meera has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 3/4 litre of juice. Riya drinks 4/7 litre. How much juice is left (in litres)? =

Answer key

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

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