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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 161 · 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. 1.7/8 − 1/2 =
  2. 2.1/2 − 1/9 =
  3. 3.5/6 − 4/5 =
  4. 4.1/4 − 1/7 =
  5. 5.3/5 − 1/10 =
  6. 6.8/9 − 2/3 =
  7. 7.A bottle has 1/3 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  8. 8.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? =
  9. 9.2/3 − 1/2 =
  10. 10.Kabir has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  11. 11.A bottle has 4/9 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  12. 12.7/8 − 1/3 =
  13. 13.2/3 − 2/9 =
  14. 14.Tara has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  15. 15.5/8 − 1/2 =
  16. 16.A bottle has 7/8 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  17. 17.2/3 − 2/5 =
  18. 18.7/9 − 2/3 =
  19. 19.A bottle has 2/3 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  20. 20.2/3 − 3/10 =
  21. 21.A bottle has 3/4 litre of juice. Tara drinks 1/8 litre. How much juice is left (in litres)? =
  22. 22.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? =
  23. 23.A bottle has 1/2 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  24. 24.6/7 − 2/3 =
  25. 25.2/3 − 3/7 =
  26. 26.A bottle has 1/2 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  27. 27.Riya has a ribbon 1/2 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 7/9 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.1/2 − 2/7 =
  30. 30.6/7 − 1/3 =
  31. 31.8/9 − 5/6 =
  32. 32.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  33. 33.Diya has a ribbon 3/4 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  34. 34.9/10 − 4/5 =
  35. 35.A tank is 9/10 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  36. 36.Meera has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  37. 37.A tank is 3/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.2/9 − 1/6 =
  39. 39.A bottle has 3/8 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 3/4 litre of juice. Rohan drinks 4/7 litre. How much juice is left (in litres)? =

Answer key

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

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