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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 609 · 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 − 4/9 =
  2. 2.Sara has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 9/10 litre of juice. Rohan drinks 3/4 litre. How much juice is left (in litres)? =
  4. 4.Ishaan has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  5. 5.9/10 − 1/4 =
  6. 6.1/2 − 1/4 =
  7. 7.3/5 − 1/10 =
  8. 8.6/7 − 1/2 =
  9. 9.A bottle has 4/7 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  10. 10.7/8 − 1/6 =
  11. 11.Tara has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  12. 12.4/5 − 3/10 =
  13. 13.6/7 − 2/3 =
  14. 14.1/6 − 1/10 =
  15. 15.A bottle has 9/10 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  16. 16.1/4 − 1/5 =
  17. 17.7/10 − 1/6 =
  18. 18.8/9 − 5/6 =
  19. 19.A bottle has 3/4 litre of juice. Ishaan drinks 5/7 litre. How much juice is left (in litres)? =
  20. 20.1/2 − 4/9 =
  21. 21.1/3 − 1/5 =
  22. 22.3/7 − 1/3 =
  23. 23.A bottle has 8/9 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  24. 24.7/8 − 3/4 =
  25. 25.A bottle has 1/2 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  26. 26.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 9/10 litre of juice. Sara drinks 3/4 litre. How much juice is left (in litres)? =
  28. 28.Riya has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  29. 29.6/7 − 1/3 =
  30. 30.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 9/10 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  32. 32.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 2/3 litre of juice. Tara drinks 2/9 litre. How much juice is left (in litres)? =
  34. 34.6/7 − 1/4 =
  35. 35.1/2 − 1/10 =
  36. 36.2/3 − 1/2 =
  37. 37.9/10 − 1/5 =
  38. 38.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  39. 39.2/5 − 1/3 =
  40. 40.A bottle has 1/2 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =

Answer key

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

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