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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 640 · 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. 1.7/9 − 1/3 =
  2. 2.4/5 − 1/3 =
  3. 3.3/8 − 1/4 =
  4. 4.A bottle has 1/2 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  5. 5.5/6 − 5/9 =
  6. 6.A bottle has 8/9 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  7. 7.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  8. 8.Sara has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  9. 9.A bottle has 2/3 litre of juice. Ishaan drinks 5/9 litre. How much juice is left (in litres)? =
  10. 10.7/10 − 1/3 =
  11. 11.1/5 − 1/6 =
  12. 12.5/9 − 1/3 =
  13. 13.2/9 − 1/6 =
  14. 14.2/3 − 4/7 =
  15. 15.3/4 − 3/7 =
  16. 16.6/7 − 1/2 =
  17. 17.1/4 − 1/10 =
  18. 18.3/5 − 1/10 =
  19. 19.A bottle has 5/8 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.Diya has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  21. 21.Tara has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 3/4 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  23. 23.5/6 − 4/5 =
  24. 24.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? =
  25. 25.4/7 − 1/2 =
  26. 26.7/8 − 1/2 =
  27. 27.2/3 − 5/8 =
  28. 28.A bottle has 3/5 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 5/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  30. 30.3/5 − 3/10 =
  31. 31.Aarav has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  32. 32.8/9 − 1/6 =
  33. 33.A bottle has 7/10 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  34. 34.4/7 − 1/4 =
  35. 35.3/4 − 2/7 =
  36. 36.5/8 − 1/4 =
  37. 37.3/5 − 1/3 =
  38. 38.5/8 − 1/3 =
  39. 39.A tank is 5/6 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  40. 40.1/4 − 1/5 =

Answer key

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

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