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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 986 · 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. 1.5/8 − 1/4 =
  2. 2.2/3 − 1/7 =
  3. 3.3/4 − 3/10 =
  4. 4.9/10 − 2/5 =
  5. 5.A bottle has 9/10 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 1/2 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  7. 7.Kabir has a ribbon 5/6 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  8. 8.A bottle has 1/2 litre of juice. Tara drinks 3/7 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 5/6 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  10. 10.Anaya has a ribbon 1/2 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  11. 11.A bottle has 2/3 litre of juice. Sara drinks 4/7 litre. How much juice is left (in litres)? =
  12. 12.7/8 − 2/3 =
  13. 13.Ishaan has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 7/10 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.Diya has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  16. 16.A tank is 1/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.8/9 − 2/3 =
  18. 18.2/3 − 1/8 =
  19. 19.8/9 − 1/6 =
  20. 20.1/3 − 1/4 =
  21. 21.A bottle has 7/10 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  22. 22.Diya has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  23. 23.A tank is 5/6 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  24. 24.2/3 − 1/4 =
  25. 25.Meera has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  26. 26.2/3 − 2/5 =
  27. 27.3/4 − 4/7 =
  28. 28.1/3 − 2/7 =
  29. 29.Arjun has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 1/3 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  31. 31.Meera has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  32. 32.1/2 − 1/10 =
  33. 33.1/2 − 1/9 =
  34. 34.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  35. 35.1/4 − 1/7 =
  36. 36.Meera has a ribbon 1/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  37. 37.5/6 − 4/9 =
  38. 38.7/8 − 3/4 =
  39. 39.7/10 − 1/2 =
  40. 40.8/9 − 5/6 =

Answer key

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

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