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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 73 · 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. 1.8/9 − 5/6 =
  2. 2.2/3 − 2/7 =
  3. 3.3/10 − 1/5 =
  4. 4.5/6 − 3/5 =
  5. 5.A bottle has 3/4 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.3/4 − 3/7 =
  7. 7.1/2 − 2/9 =
  8. 8.A bottle has 4/5 litre of juice. Vihaan drinks 7/10 litre. How much juice is left (in litres)? =
  9. 9.Vihaan has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  10. 10.Meera has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  11. 11.1/2 − 4/9 =
  12. 12.Ishaan has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  13. 13.A tank is 3/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  14. 14.2/3 − 3/8 =
  15. 15.2/3 − 3/7 =
  16. 16.A bottle has 1/6 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  17. 17.A bottle has 3/4 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  18. 18.1/2 − 2/5 =
  19. 19.3/4 − 2/7 =
  20. 20.5/6 − 2/3 =
  21. 21.3/10 − 1/4 =
  22. 22.A bottle has 4/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 5/9 =
  24. 24.3/5 − 1/10 =
  25. 25.9/10 − 1/4 =
  26. 26.1/4 − 1/7 =
  27. 27.5/8 − 1/4 =
  28. 28.4/5 − 1/2 =
  29. 29.8/9 − 1/6 =
  30. 30.1/3 − 3/10 =
  31. 31.2/3 − 3/5 =
  32. 32.3/4 − 1/5 =
  33. 33.Riya has a ribbon 1/2 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  34. 34.6/7 − 3/4 =
  35. 35.5/9 − 1/3 =
  36. 36.1/2 − 1/5 =
  37. 37.1/3 − 1/7 =
  38. 38.5/8 − 1/3 =
  39. 39.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  40. 40.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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