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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 136 · 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. 1.3/4 − 1/3 =
  2. 2.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? =
  3. 3.7/8 − 1/4 =
  4. 4.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.Vihaan has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 5/6 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  7. 7.3/5 − 1/2 =
  8. 8.A bottle has 2/3 litre of juice. Anaya drinks 3/7 litre. How much juice is left (in litres)? =
  9. 9.2/3 − 4/7 =
  10. 10.A bottle has 1/2 litre of juice. Arjun drinks 4/9 litre. How much juice is left (in litres)? =
  11. 11.3/7 − 1/3 =
  12. 12.3/4 − 1/7 =
  13. 13.4/5 − 3/10 =
  14. 14.A bottle has 5/9 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  15. 15.2/3 − 1/10 =
  16. 16.7/9 − 1/2 =
  17. 17.1/3 − 2/7 =
  18. 18.Diya has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  19. 19.1/3 − 1/8 =
  20. 20.5/8 − 1/2 =
  21. 21.3/4 − 1/8 =
  22. 22.5/9 − 1/3 =
  23. 23.A bottle has 5/8 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 5/6 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 5/6 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  26. 26.6/7 − 3/4 =
  27. 27.A bottle has 5/6 litre of juice. Ishaan drinks 7/9 litre. How much juice is left (in litres)? =
  28. 28.Meera has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  29. 29.3/7 − 1/4 =
  30. 30.1/6 − 1/10 =
  31. 31.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  32. 32.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  33. 33.7/10 − 2/5 =
  34. 34.4/9 − 1/3 =
  35. 35.7/9 − 1/6 =
  36. 36.A bottle has 2/3 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  37. 37.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 9/10 litre of juice. Diya drinks 4/5 litre. How much juice is left (in litres)? =
  39. 39.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  40. 40.5/6 − 2/3 =

Answer key

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

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