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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 322 · 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.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.A bottle has 5/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 5/6 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 5/6 litre of juice. Meera drinks 5/9 litre. How much juice is left (in litres)? =
  5. 5.2/3 − 4/9 =
  6. 6.5/7 − 1/2 =
  7. 7.8/9 − 1/3 =
  8. 8.6/7 − 2/3 =
  9. 9.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? =
  10. 10.3/4 − 2/5 =
  11. 11.6/7 − 1/3 =
  12. 12.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 5/7 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  14. 14.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  15. 15.2/5 − 3/10 =
  16. 16.9/10 − 1/6 =
  17. 17.Sara has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.Diya has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  19. 19.5/9 − 1/2 =
  20. 20.5/6 − 5/8 =
  21. 21.4/7 − 1/3 =
  22. 22.A bottle has 6/7 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.3/4 − 1/6 =
  24. 24.2/3 − 1/9 =
  25. 25.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? =
  26. 26.8/9 − 1/2 =
  27. 27.7/8 − 1/4 =
  28. 28.4/5 − 3/10 =
  29. 29.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 2/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  31. 31.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  32. 32.7/10 − 2/5 =
  33. 33.2/3 − 4/7 =
  34. 34.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  35. 35.8/9 − 2/3 =
  36. 36.3/5 − 1/4 =
  37. 37.5/6 − 3/10 =
  38. 38.7/10 − 3/5 =
  39. 39.7/8 − 3/4 =
  40. 40.6/7 − 1/4 =

Answer key

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

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