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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 511 · 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. 1.5/6 − 4/9 =
  2. 2.1/2 − 3/8 =
  3. 3.8/9 − 5/6 =
  4. 4.1/2 − 1/9 =
  5. 5.1/4 − 1/5 =
  6. 6.3/8 − 1/4 =
  7. 7.3/5 − 1/2 =
  8. 8.6/7 − 1/2 =
  9. 9.5/9 − 1/2 =
  10. 10.9/10 − 1/5 =
  11. 11.Rohan has a ribbon 3/4 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.8/9 − 1/3 =
  14. 14.3/5 − 1/3 =
  15. 15.Arjun has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  16. 16.Diya has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  17. 17.4/5 − 1/4 =
  18. 18.3/4 − 2/7 =
  19. 19.A bottle has 1/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 9/10 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  21. 21.3/5 − 1/4 =
  22. 22.A bottle has 3/4 litre of juice. Ishaan drinks 5/7 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 1/2 =
  24. 24.9/10 − 5/6 =
  25. 25.3/5 − 1/10 =
  26. 26.A bottle has 4/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  27. 27.Kabir has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  28. 28.Arjun has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 3/5 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 3/8 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.A bottle has 4/5 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 7/8 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  33. 33.Arjun has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  34. 34.1/4 − 1/7 =
  35. 35.Rohan has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  36. 36.3/7 − 1/3 =
  37. 37.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 1/4 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  39. 39.4/5 − 1/2 =
  40. 40.3/4 − 4/7 =

Answer key

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

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