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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 663 · 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. 1.7/9 − 2/3 =
  2. 2.A bottle has 2/5 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.7/10 − 2/5 =
  4. 4.A bottle has 7/10 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.6/7 − 1/4 =
  6. 6.A bottle has 4/7 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  7. 7.6/7 − 1/3 =
  8. 8.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  9. 9.A tank is 1/2 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  10. 10.9/10 − 3/4 =
  11. 11.1/2 − 1/9 =
  12. 12.5/8 − 1/3 =
  13. 13.5/9 − 1/2 =
  14. 14.3/4 − 3/5 =
  15. 15.4/7 − 1/2 =
  16. 16.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  17. 17.8/9 − 2/3 =
  18. 18.1/3 − 1/7 =
  19. 19.7/9 − 1/6 =
  20. 20.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 5/6 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  22. 22.Vihaan has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  23. 23.7/10 − 3/5 =
  24. 24.1/2 − 3/7 =
  25. 25.A bottle has 9/10 litre of juice. Riya drinks 3/5 litre. How much juice is left (in litres)? =
  26. 26.4/5 − 1/2 =
  27. 27.3/4 − 1/5 =
  28. 28.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  29. 29.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.3/4 − 1/10 =
  31. 31.1/4 − 1/5 =
  32. 32.7/8 − 1/3 =
  33. 33.2/9 − 1/6 =
  34. 34.7/10 − 1/5 =
  35. 35.5/7 − 1/2 =
  36. 36.1/4 − 1/10 =
  37. 37.Arjun has a ribbon 9/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  38. 38.5/6 − 4/5 =
  39. 39.5/6 − 5/9 =
  40. 40.9/10 − 1/5 =

Answer key

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

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