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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 247 · 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. 1.5/7 − 1/3 =
  2. 2.7/10 − 1/5 =
  3. 3.4/5 − 1/3 =
  4. 4.8/9 − 1/6 =
  5. 5.4/5 − 1/10 =
  6. 6.Sara has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  7. 7.3/5 − 1/6 =
  8. 8.8/9 − 1/3 =
  9. 9.1/4 − 1/8 =
  10. 10.A bottle has 3/10 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  11. 11.7/9 − 2/3 =
  12. 12.1/4 − 1/7 =
  13. 13.A bottle has 4/5 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  14. 14.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? =
  15. 15.1/2 − 3/10 =
  16. 16.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? =
  17. 17.6/7 − 1/2 =
  18. 18.Diya has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 1/9 =
  20. 20.1/3 − 2/7 =
  21. 21.A bottle has 8/9 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  22. 22.2/5 − 1/6 =
  23. 23.A tank is 5/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  24. 24.3/5 − 1/4 =
  25. 25.7/10 − 1/6 =
  26. 26.Rohan has a ribbon 1/2 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  27. 27.Rohan has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 4/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  29. 29.5/8 − 1/3 =
  30. 30.A bottle has 9/10 litre of juice. Ishaan drinks 2/3 litre. How much juice is left (in litres)? =
  31. 31.8/9 − 5/6 =
  32. 32.A bottle has 3/5 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  33. 33.4/5 − 2/3 =
  34. 34.2/3 − 5/9 =
  35. 35.3/4 − 4/7 =
  36. 36.1/6 − 1/9 =
  37. 37.Aarav has a ribbon 5/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  38. 38.9/10 − 3/5 =
  39. 39.A bottle has 1/3 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  40. 40.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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