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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 5 · 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 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  2. 2.1/3 − 1/6 =
  3. 3.2/3 − 1/4 =
  4. 4.9/10 − 3/5 =
  5. 5.6/7 − 1/3 =
  6. 6.9/10 − 2/3 =
  7. 7.1/2 − 3/7 =
  8. 8.Arjun has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  9. 9.3/8 − 1/6 =
  10. 10.A bottle has 8/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  11. 11.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  12. 12.3/8 − 1/3 =
  13. 13.A bottle has 2/3 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 2/3 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  15. 15.A bottle has 3/5 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  16. 16.5/8 − 1/4 =
  17. 17.1/2 − 2/7 =
  18. 18.3/5 − 1/10 =
  19. 19.3/10 − 1/4 =
  20. 20.2/9 − 1/6 =
  21. 21.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  22. 22.A bottle has 7/9 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 1/3 litre of juice. Tara drinks 1/9 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 1/2 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  25. 25.2/3 − 1/5 =
  26. 26.Riya has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  27. 27.6/7 − 2/3 =
  28. 28.5/6 − 1/5 =
  29. 29.3/4 − 2/5 =
  30. 30.A bottle has 1/3 litre of juice. Sara drinks 3/10 litre. How much juice is left (in litres)? =
  31. 31.Kabir has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  32. 32.A bottle has 1/4 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  33. 33.1/4 − 1/7 =
  34. 34.5/6 − 5/8 =
  35. 35.2/3 − 2/7 =
  36. 36.Ishaan has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  37. 37.1/2 − 4/9 =
  38. 38.A bottle has 4/5 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  39. 39.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.5/6 − 7/9 =

Answer key

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

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