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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 112 · 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. 1.3/7 − 1/3 =
  2. 2.A bottle has 8/9 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  3. 3.1/2 − 2/9 =
  4. 4.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.1/2 − 1/7 =
  6. 6.A bottle has 4/5 litre of juice. Vihaan drinks 3/4 litre. How much juice is left (in litres)? =
  7. 7.5/6 − 3/5 =
  8. 8.7/8 − 1/3 =
  9. 9.8/9 − 1/2 =
  10. 10.A bottle has 4/5 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  11. 11.5/6 − 5/8 =
  12. 12.3/4 − 5/7 =
  13. 13.A bottle has 5/9 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.9/10 − 1/2 =
  15. 15.3/4 − 3/8 =
  16. 16.3/4 − 5/8 =
  17. 17.Arjun has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  18. 18.Aarav has a ribbon 3/4 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  19. 19.1/3 − 1/9 =
  20. 20.Diya has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  21. 21.2/3 − 1/8 =
  22. 22.3/10 − 1/6 =
  23. 23.5/8 − 1/4 =
  24. 24.A bottle has 2/3 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  25. 25.7/8 − 1/4 =
  26. 26.Kabir has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  27. 27.2/3 − 1/5 =
  28. 28.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.5/6 − 7/10 =
  30. 30.9/10 − 4/5 =
  31. 31.3/5 − 1/10 =
  32. 32.A bottle has 3/4 litre of juice. Sara drinks 4/7 litre. How much juice is left (in litres)? =
  33. 33.4/7 − 1/3 =
  34. 34.Sara has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  35. 35.6/7 − 3/4 =
  36. 36.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 1/3 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 2/3 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  39. 39.Diya has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  40. 40.A tank is 3/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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