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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 743 · 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 − 1/3 =
  2. 2.4/5 − 1/4 =
  3. 3.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? =
  4. 4.7/10 − 1/3 =
  5. 5.2/3 − 1/10 =
  6. 6.5/7 − 2/3 =
  7. 7.6/7 − 2/3 =
  8. 8.A bottle has 3/4 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  9. 9.5/7 − 1/2 =
  10. 10.1/5 − 1/6 =
  11. 11.Ishaan has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 2/3 litre of juice. Sara drinks 2/7 litre. How much juice is left (in litres)? =
  13. 13.2/3 − 5/8 =
  14. 14.5/6 − 3/10 =
  15. 15.3/7 − 1/4 =
  16. 16.5/9 − 1/3 =
  17. 17.1/2 − 4/9 =
  18. 18.A tank is 2/3 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  19. 19.3/8 − 1/6 =
  20. 20.A bottle has 4/9 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.7/8 − 1/6 =
  22. 22.A bottle has 5/8 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.Tara has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  24. 24.3/5 − 1/2 =
  25. 25.7/10 − 1/5 =
  26. 26.A bottle has 4/5 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  27. 27.Anaya has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 8/9 litre of juice. Arjun drinks 5/6 litre. How much juice is left (in litres)? =
  29. 29.4/7 − 1/2 =
  30. 30.Diya has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  31. 31.3/4 − 1/5 =
  32. 32.8/9 − 1/6 =
  33. 33.A bottle has 5/6 litre of juice. Vihaan drinks 2/9 litre. How much juice is left (in litres)? =
  34. 34.3/10 − 1/6 =
  35. 35.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  36. 36.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.3/4 − 2/5 =
  38. 38.8/9 − 1/3 =
  39. 39.1/3 − 1/5 =
  40. 40.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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