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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 360 · 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. 1.4/5 − 3/10 =
  2. 2.2/3 − 1/2 =
  3. 3.5/6 − 3/10 =
  4. 4.1/2 − 3/8 =
  5. 5.Anaya has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  6. 6.Vihaan has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  7. 7.3/7 − 1/4 =
  8. 8.Aarav has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  9. 9.A bottle has 7/9 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  10. 10.A tank is 5/6 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  11. 11.2/3 − 2/7 =
  12. 12.3/4 − 5/7 =
  13. 13.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  14. 14.3/8 − 1/4 =
  15. 15.2/3 − 1/4 =
  16. 16.Tara has a ribbon 1/2 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  17. 17.Ishaan has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  18. 18.5/6 − 4/9 =
  19. 19.2/3 − 1/8 =
  20. 20.4/5 − 1/6 =
  21. 21.A bottle has 3/4 litre of juice. Meera drinks 1/10 litre. How much juice is left (in litres)? =
  22. 22.1/2 − 1/10 =
  23. 23.1/3 − 1/8 =
  24. 24.1/5 − 1/10 =
  25. 25.3/5 − 1/6 =
  26. 26.2/3 − 2/9 =
  27. 27.3/5 − 1/4 =
  28. 28.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? =
  29. 29.2/5 − 3/10 =
  30. 30.Ishaan has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  31. 31.7/8 − 1/4 =
  32. 32.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 7/10 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  34. 34.A tank is 1/2 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  35. 35.3/4 − 1/7 =
  36. 36.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.2/3 − 1/10 =
  39. 39.A bottle has 1/2 litre of juice. Ishaan drinks 2/5 litre. How much juice is left (in litres)? =
  40. 40.5/6 − 4/5 =

Answer key

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

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