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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 928 · 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. 1.5/6 − 4/9 =
  2. 2.9/10 − 1/4 =
  3. 3.A tank is 9/10 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  4. 4.3/4 − 1/7 =
  5. 5.3/4 − 2/3 =
  6. 6.8/9 − 1/3 =
  7. 7.Sara has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  9. 9.4/5 − 1/2 =
  10. 10.A bottle has 7/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 3/4 litre of juice. Anaya drinks 3/5 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 3/4 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  13. 13.2/3 − 3/7 =
  14. 14.8/9 − 1/6 =
  15. 15.8/9 − 5/6 =
  16. 16.A bottle has 5/6 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  17. 17.3/4 − 3/7 =
  18. 18.1/6 − 1/8 =
  19. 19.Rohan has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  20. 20.5/6 − 2/5 =
  21. 21.1/3 − 1/9 =
  22. 22.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  23. 23.A tank is 3/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  25. 25.A bottle has 3/8 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  26. 26.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 7/10 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 5/6 litre of juice. Aarav drinks 5/8 litre. How much juice is left (in litres)? =
  29. 29.3/4 − 1/5 =
  30. 30.3/10 − 1/4 =
  31. 31.8/9 − 2/3 =
  32. 32.5/7 − 2/3 =
  33. 33.1/4 − 1/10 =
  34. 34.A bottle has 7/8 litre of juice. Aarav drinks 3/4 litre. How much juice is left (in litres)? =
  35. 35.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? =
  36. 36.7/9 − 1/3 =
  37. 37.9/10 − 1/2 =
  38. 38.1/3 − 1/5 =
  39. 39.3/4 − 2/7 =
  40. 40.Tara has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =

Answer key

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

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