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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 874 · 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. 1.1/3 − 3/10 =
  2. 2.4/7 − 1/2 =
  3. 3.Ishaan has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  4. 4.2/3 − 5/9 =
  5. 5.5/6 − 1/2 =
  6. 6.Diya has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  7. 7.2/3 − 3/5 =
  8. 8.A bottle has 3/4 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 5/6 litre of juice. Kabir drinks 4/5 litre. How much juice is left (in litres)? =
  10. 10.4/7 − 1/3 =
  11. 11.1/4 − 1/8 =
  12. 12.Ishaan has a ribbon 5/6 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  13. 13.3/5 − 1/2 =
  14. 14.5/6 − 1/8 =
  15. 15.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.2/3 − 2/7 =
  17. 17.Sara has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  18. 18.5/7 − 1/3 =
  19. 19.7/10 − 1/5 =
  20. 20.7/10 − 2/5 =
  21. 21.3/4 − 5/7 =
  22. 22.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? =
  23. 23.Arjun has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  24. 24.A bottle has 6/7 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 3/8 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  26. 26.9/10 − 2/3 =
  27. 27.1/2 − 4/9 =
  28. 28.A bottle has 4/7 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  29. 29.7/9 − 1/3 =
  30. 30.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 2/3 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 1/2 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.5/8 − 1/3 =
  34. 34.Meera has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.A bottle has 8/9 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.Ishaan has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  37. 37.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.6/7 − 1/3 =
  39. 39.5/8 − 1/6 =
  40. 40.A bottle has 7/10 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =

Answer key

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

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