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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 676 · 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. 1.8/9 − 5/6 =
  2. 2.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  3. 3.9/10 − 1/5 =
  4. 4.4/7 − 1/4 =
  5. 5.5/8 − 1/2 =
  6. 6.3/4 − 5/8 =
  7. 7.A bottle has 3/4 litre of juice. Arjun drinks 5/8 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 4/5 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  9. 9.Kabir has a ribbon 3/4 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  10. 10.Kabir has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  11. 11.1/3 − 1/8 =
  12. 12.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  13. 13.1/2 − 1/8 =
  14. 14.A bottle has 2/3 litre of juice. Aarav drinks 5/9 litre. How much juice is left (in litres)? =
  15. 15.5/7 − 1/4 =
  16. 16.9/10 − 1/2 =
  17. 17.Tara has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 4/9 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.2/5 − 1/10 =
  20. 20.Kabir has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  21. 21.3/4 − 1/7 =
  22. 22.1/4 − 1/10 =
  23. 23.5/8 − 1/6 =
  24. 24.A bottle has 5/6 litre of juice. Rohan drinks 3/10 litre. How much juice is left (in litres)? =
  25. 25.4/5 − 1/10 =
  26. 26.9/10 − 1/3 =
  27. 27.1/5 − 1/6 =
  28. 28.7/9 − 1/2 =
  29. 29.3/4 − 3/7 =
  30. 30.A bottle has 1/3 litre of juice. Rohan drinks 1/8 litre. How much juice is left (in litres)? =
  31. 31.1/3 − 2/9 =
  32. 32.A bottle has 3/4 litre of juice. Kabir drinks 3/8 litre. How much juice is left (in litres)? =
  33. 33.7/8 − 1/6 =
  34. 34.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  35. 35.7/10 − 2/3 =
  36. 36.5/6 − 7/9 =
  37. 37.A bottle has 5/6 litre of juice. Diya drinks 7/10 litre. How much juice is left (in litres)? =
  38. 38.Tara has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  39. 39.Aarav has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  40. 40.5/6 − 5/8 =

Answer key

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

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