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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 97 · 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 − 1/4 =
  2. 2.Kabir has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  3. 3.3/7 − 1/3 =
  4. 4.9/10 − 3/4 =
  5. 5.9/10 − 1/2 =
  6. 6.4/5 − 7/10 =
  7. 7.2/5 − 1/4 =
  8. 8.2/3 − 2/7 =
  9. 9.A bottle has 2/5 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  10. 10.8/9 − 2/3 =
  11. 11.5/6 − 1/8 =
  12. 12.1/4 − 1/7 =
  13. 13.7/9 − 2/3 =
  14. 14.A bottle has 8/9 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  15. 15.1/3 − 1/8 =
  16. 16.6/7 − 1/4 =
  17. 17.2/3 − 3/5 =
  18. 18.2/3 − 5/9 =
  19. 19.A bottle has 3/4 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 4/7 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 1/3 litre of juice. Rohan drinks 2/7 litre. How much juice is left (in litres)? =
  22. 22.Diya has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 7/8 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  24. 24.5/6 − 1/4 =
  25. 25.5/9 − 1/6 =
  26. 26.A tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  27. 27.1/2 − 2/5 =
  28. 28.A tank is 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.Meera has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  31. 31.3/4 − 3/7 =
  32. 32.A bottle has 1/2 litre of juice. Sara drinks 2/9 litre. How much juice is left (in litres)? =
  33. 33.Sara has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  34. 34.8/9 − 5/6 =
  35. 35.1/6 − 1/8 =
  36. 36.A tank is 2/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  37. 37.Riya has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  38. 38.9/10 − 1/6 =
  39. 39.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  40. 40.3/4 − 4/7 =

Answer key

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

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