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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 639 · 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 − 1/2 =
  2. 2.5/6 − 1/8 =
  3. 3.1/2 − 1/7 =
  4. 4.A bottle has 5/6 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  5. 5.A bottle has 5/6 litre of juice. Anaya drinks 1/10 litre. How much juice is left (in litres)? =
  6. 6.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  7. 7.2/9 − 1/6 =
  8. 8.1/2 − 1/5 =
  9. 9.7/9 − 1/2 =
  10. 10.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  11. 11.5/9 − 1/6 =
  12. 12.1/5 − 1/6 =
  13. 13.Riya has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  14. 14.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  15. 15.A bottle has 2/3 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  16. 16.1/2 − 1/4 =
  17. 17.3/8 − 1/3 =
  18. 18.4/7 − 1/3 =
  19. 19.A bottle has 7/8 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  20. 20.A tank is 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  21. 21.7/8 − 1/2 =
  22. 22.3/10 − 1/5 =
  23. 23.7/10 − 1/3 =
  24. 24.3/4 − 3/7 =
  25. 25.8/9 − 2/3 =
  26. 26.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 4/7 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  28. 28.3/4 − 3/8 =
  29. 29.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  30. 30.3/5 − 1/6 =
  31. 31.3/4 − 2/5 =
  32. 32.5/7 − 1/2 =
  33. 33.1/3 − 2/7 =
  34. 34.1/2 − 3/10 =
  35. 35.Meera has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  36. 36.2/3 − 1/7 =
  37. 37.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.3/4 − 5/7 =
  39. 39.9/10 − 4/5 =
  40. 40.3/5 − 1/10 =

Answer key

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

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