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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 200 · 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. 1.3/5 − 1/4 =
  2. 2.8/9 − 1/2 =
  3. 3.3/5 − 1/3 =
  4. 4.A bottle has 2/5 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.A tank is 1/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  6. 6.8/9 − 2/3 =
  7. 7.3/4 − 3/5 =
  8. 8.2/9 − 1/6 =
  9. 9.4/5 − 1/2 =
  10. 10.A bottle has 9/10 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  11. 11.3/4 − 5/7 =
  12. 12.A bottle has 3/4 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  13. 13.2/3 − 4/7 =
  14. 14.5/6 − 3/8 =
  15. 15.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.Meera has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  17. 17.2/3 − 2/5 =
  18. 18.7/10 − 2/5 =
  19. 19.7/8 − 1/2 =
  20. 20.1/4 − 1/8 =
  21. 21.5/7 − 1/4 =
  22. 22.1/6 − 1/8 =
  23. 23.5/6 − 4/9 =
  24. 24.Diya has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  25. 25.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  27. 27.7/9 − 1/2 =
  28. 28.3/5 − 3/10 =
  29. 29.4/7 − 1/4 =
  30. 30.4/5 − 1/4 =
  31. 31.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  32. 32.5/6 − 1/8 =
  33. 33.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 3/4 litre of juice. Sara drinks 3/8 litre. How much juice is left (in litres)? =
  35. 35.2/3 − 2/7 =
  36. 36.2/3 − 1/9 =
  37. 37.A bottle has 1/2 litre of juice. Ishaan drinks 3/8 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 3/5 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  39. 39.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  40. 40.3/5 − 1/6 =

Answer key

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

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