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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 228 · 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. 1.7/10 − 1/3 =
  2. 2.1/3 − 1/8 =
  3. 3.2/3 − 1/7 =
  4. 4.A bottle has 5/6 litre of juice. Arjun drinks 3/8 litre. How much juice is left (in litres)? =
  5. 5.7/10 − 1/2 =
  6. 6.5/6 − 2/9 =
  7. 7.A tank is 5/6 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  8. 8.Vihaan has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  9. 9.2/9 − 1/6 =
  10. 10.3/8 − 1/6 =
  11. 11.1/3 − 2/9 =
  12. 12.9/10 − 1/5 =
  13. 13.4/5 − 1/4 =
  14. 14.5/6 − 4/5 =
  15. 15.A bottle has 8/9 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  16. 16.8/9 − 1/2 =
  17. 17.A bottle has 3/10 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  18. 18.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  19. 19.Kabir has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  20. 20.A bottle has 2/3 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  21. 21.Rohan has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  22. 22.3/5 − 1/6 =
  23. 23.A bottle has 1/2 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  24. 24.9/10 − 2/3 =
  25. 25.Arjun has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  26. 26.9/10 − 2/5 =
  27. 27.1/3 − 1/7 =
  28. 28.5/7 − 1/2 =
  29. 29.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  30. 30.8/9 − 1/3 =
  31. 31.Rohan has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  32. 32.4/5 − 1/2 =
  33. 33.9/10 − 3/4 =
  34. 34.7/9 − 2/3 =
  35. 35.3/8 − 1/4 =
  36. 36.5/6 − 3/8 =
  37. 37.A bottle has 6/7 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  38. 38.3/4 − 1/2 =
  39. 39.2/3 − 1/6 =
  40. 40.Tara has a ribbon 5/6 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =

Answer key

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

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