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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 283 · 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.Rohan has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  2. 2.A bottle has 5/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 2/5 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  4. 4.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  5. 5.3/10 − 1/5 =
  6. 6.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  7. 7.4/5 − 3/10 =
  8. 8.1/3 − 2/9 =
  9. 9.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  10. 10.1/2 − 1/7 =
  11. 11.5/9 − 1/2 =
  12. 12.A bottle has 7/9 litre of juice. Riya drinks 2/3 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 9/10 litre of juice. Kabir drinks 3/4 litre. How much juice is left (in litres)? =
  14. 14.3/4 − 7/10 =
  15. 15.A bottle has 5/6 litre of juice. Meera drinks 5/8 litre. How much juice is left (in litres)? =
  16. 16.9/10 − 1/6 =
  17. 17.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  18. 18.8/9 − 1/2 =
  19. 19.A bottle has 1/4 litre of juice. Tara drinks 1/7 litre. How much juice is left (in litres)? =
  20. 20.1/3 − 1/7 =
  21. 21.A bottle has 9/10 litre of juice. Tara drinks 3/5 litre. How much juice is left (in litres)? =
  22. 22.7/8 − 2/3 =
  23. 23.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.3/5 − 1/2 =
  25. 25.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.3/4 − 5/8 =
  27. 27.4/5 − 2/3 =
  28. 28.2/7 − 1/4 =
  29. 29.1/3 − 1/9 =
  30. 30.5/7 − 1/4 =
  31. 31.2/3 − 1/7 =
  32. 32.A bottle has 1/2 litre of juice. Meera drinks 2/9 litre. How much juice is left (in litres)? =
  33. 33.2/3 − 3/8 =
  34. 34.Arjun has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  35. 35.3/8 − 1/6 =
  36. 36.4/5 − 1/6 =
  37. 37.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.Vihaan has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 2/5 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 6/7 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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