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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 858 · 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 − 5/9 =
  2. 2.3/4 − 3/7 =
  3. 3.8/9 − 1/3 =
  4. 4.A bottle has 2/9 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  5. 5.A bottle has 2/5 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  6. 6.9/10 − 3/5 =
  7. 7.9/10 − 1/3 =
  8. 8.Diya has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  9. 9.7/10 − 2/3 =
  10. 10.2/3 − 3/7 =
  11. 11.Riya has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  13. 13.2/3 − 2/9 =
  14. 14.A tank is 1/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  15. 15.A bottle has 7/9 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  16. 16.Aarav has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 1/2 litre of juice. Vihaan drinks 2/9 litre. How much juice is left (in litres)? =
  18. 18.5/7 − 1/4 =
  19. 19.3/8 − 1/4 =
  20. 20.1/2 − 3/7 =
  21. 21.8/9 − 1/6 =
  22. 22.Sara has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  23. 23.1/3 − 1/7 =
  24. 24.Tara has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  25. 25.1/4 − 1/10 =
  26. 26.1/3 − 1/9 =
  27. 27.3/4 − 2/7 =
  28. 28.Anaya has a ribbon 4/5 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  29. 29.2/3 − 4/7 =
  30. 30.Kabir has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  31. 31.5/6 − 5/8 =
  32. 32.5/9 − 1/6 =
  33. 33.2/3 − 3/10 =
  34. 34.Vihaan has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  35. 35.7/9 − 1/2 =
  36. 36.2/5 − 1/3 =
  37. 37.9/10 − 3/4 =
  38. 38.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  39. 39.A bottle has 3/5 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  40. 40.Riya has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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