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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 525 · 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 − 1/2 =
  2. 2.7/10 − 3/5 =
  3. 3.3/7 − 1/3 =
  4. 4.1/3 − 3/10 =
  5. 5.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  6. 6.4/5 − 1/6 =
  7. 7.3/4 − 3/7 =
  8. 8.5/9 − 1/2 =
  9. 9.5/6 − 1/9 =
  10. 10.7/8 − 1/4 =
  11. 11.7/8 − 1/2 =
  12. 12.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 7/8 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  14. 14.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  15. 15.A bottle has 1/2 litre of juice. Vihaan drinks 1/9 litre. How much juice is left (in litres)? =
  16. 16.3/4 − 3/10 =
  17. 17.9/10 − 2/3 =
  18. 18.5/8 − 1/3 =
  19. 19.Kabir has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  20. 20.4/5 − 2/3 =
  21. 21.A bottle has 5/6 litre of juice. Ishaan drinks 4/5 litre. How much juice is left (in litres)? =
  22. 22.Sara has a ribbon 5/6 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  23. 23.2/3 − 4/9 =
  24. 24.1/4 − 1/7 =
  25. 25.1/2 − 2/9 =
  26. 26.2/3 − 2/9 =
  27. 27.Diya has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  28. 28.Tara has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 4/5 litre of juice. Rohan drinks 7/10 litre. How much juice is left (in litres)? =
  30. 30.3/5 − 1/2 =
  31. 31.2/5 − 1/6 =
  32. 32.3/4 − 4/7 =
  33. 33.9/10 − 1/3 =
  34. 34.8/9 − 1/3 =
  35. 35.Riya has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 1/2 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 9/10 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  38. 38.3/7 − 1/4 =
  39. 39.4/5 − 1/3 =
  40. 40.A tank is 7/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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