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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 208 · 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.Meera has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.A bottle has 2/5 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.1/3 − 1/7 =
  4. 4.1/5 − 1/10 =
  5. 5.A bottle has 3/4 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.1/2 − 1/7 =
  7. 7.A bottle has 9/10 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  8. 8.7/10 − 3/5 =
  9. 9.2/3 − 1/4 =
  10. 10.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  11. 11.5/7 − 2/3 =
  12. 12.A bottle has 5/6 litre of juice. Arjun drinks 3/5 litre. How much juice is left (in litres)? =
  13. 13.6/7 − 3/4 =
  14. 14.2/7 − 1/4 =
  15. 15.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  16. 16.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  17. 17.8/9 − 1/2 =
  18. 18.2/5 − 1/10 =
  19. 19.A bottle has 7/8 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.5/7 − 1/3 =
  21. 21.7/9 − 2/3 =
  22. 22.A bottle has 1/3 litre of juice. Kabir drinks 1/7 litre. How much juice is left (in litres)? =
  23. 23.7/8 − 3/4 =
  24. 24.5/8 − 1/3 =
  25. 25.1/3 − 2/9 =
  26. 26.3/4 − 3/10 =
  27. 27.2/5 − 3/10 =
  28. 28.1/6 − 1/10 =
  29. 29.1/4 − 1/6 =
  30. 30.Rohan has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  31. 31.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  32. 32.5/6 − 3/5 =
  33. 33.A bottle has 3/4 litre of juice. Diya drinks 3/5 litre. How much juice is left (in litres)? =
  34. 34.A tank is 2/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  35. 35.4/9 − 1/3 =
  36. 36.A bottle has 5/6 litre of juice. Ishaan drinks 5/9 litre. How much juice is left (in litres)? =
  37. 37.1/6 − 1/9 =
  38. 38.5/9 − 1/6 =
  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.Meera has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =

Answer key

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

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