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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 710 · 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 − 3/7 =
  2. 2.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  3. 3.1/2 − 1/5 =
  4. 4.1/4 − 1/7 =
  5. 5.5/7 − 2/3 =
  6. 6.A bottle has 5/6 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  7. 7.3/4 − 3/8 =
  8. 8.3/4 − 2/3 =
  9. 9.6/7 − 1/2 =
  10. 10.3/5 − 1/6 =
  11. 11.2/3 − 1/9 =
  12. 12.A bottle has 1/2 litre of juice. Rohan drinks 1/8 litre. How much juice is left (in litres)? =
  13. 13.7/9 − 2/3 =
  14. 14.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  15. 15.7/9 − 1/3 =
  16. 16.Meera has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 1/2 litre of juice. Vihaan drinks 3/7 litre. How much juice is left (in litres)? =
  18. 18.1/2 − 4/9 =
  19. 19.6/7 − 3/4 =
  20. 20.5/6 − 3/8 =
  21. 21.A bottle has 3/4 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 3/5 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.7/9 − 1/2 =
  24. 24.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  25. 25.4/5 − 3/4 =
  26. 26.A bottle has 5/6 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  27. 27.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  28. 28.Anaya has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  29. 29.1/3 − 1/6 =
  30. 30.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  31. 31.1/2 − 1/9 =
  32. 32.2/3 − 2/9 =
  33. 33.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  34. 34.5/6 − 3/10 =
  35. 35.1/2 − 2/5 =
  36. 36.9/10 − 3/4 =
  37. 37.5/6 − 3/5 =
  38. 38.A bottle has 1/3 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  39. 39.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.Riya has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =

Answer key

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

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