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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 395 · 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. 1.4/5 − 3/10 =
  2. 2.Tara has a ribbon 5/6 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  3. 3.2/5 − 1/10 =
  4. 4.9/10 − 1/6 =
  5. 5.1/2 − 1/7 =
  6. 6.5/6 − 4/5 =
  7. 7.A bottle has 3/8 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  8. 8.5/6 − 7/10 =
  9. 9.1/3 − 2/7 =
  10. 10.7/9 − 2/3 =
  11. 11.1/2 − 2/7 =
  12. 12.9/10 − 1/2 =
  13. 13.A bottle has 2/3 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  14. 14.7/9 − 1/6 =
  15. 15.1/2 − 1/5 =
  16. 16.5/6 − 2/9 =
  17. 17.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 3/4 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  19. 19.5/6 − 1/8 =
  20. 20.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? =
  21. 21.3/7 − 1/4 =
  22. 22.4/5 − 1/6 =
  23. 23.Sara has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  24. 24.8/9 − 1/6 =
  25. 25.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  26. 26.7/8 − 1/2 =
  27. 27.8/9 − 1/2 =
  28. 28.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  29. 29.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  30. 30.Ishaan has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 3/4 litre of juice. Sara drinks 5/8 litre. How much juice is left (in litres)? =
  32. 32.2/3 − 5/9 =
  33. 33.5/6 − 1/5 =
  34. 34.Meera has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.3/5 − 1/2 =
  36. 36.3/5 − 1/6 =
  37. 37.5/9 − 1/3 =
  38. 38.2/3 − 3/8 =
  39. 39.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  40. 40.8/9 − 2/3 =

Answer key

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

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