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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 474 · 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. 1.7/8 − 1/6 =
  2. 2.3/4 − 1/3 =
  3. 3.7/8 − 1/4 =
  4. 4.7/10 − 2/5 =
  5. 5.A bottle has 5/6 litre of juice. Ishaan drinks 7/9 litre. How much juice is left (in litres)? =
  6. 6.Tara has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  7. 7.2/3 − 1/5 =
  8. 8.3/10 − 1/4 =
  9. 9.2/5 − 1/4 =
  10. 10.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  11. 11.3/4 − 4/7 =
  12. 12.Diya has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  13. 13.Sara has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 4/7 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  15. 15.5/9 − 1/2 =
  16. 16.Diya has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  17. 17.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  18. 18.5/6 − 1/5 =
  19. 19.4/5 − 1/6 =
  20. 20.A bottle has 4/5 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  21. 21.5/6 − 2/9 =
  22. 22.7/8 − 1/2 =
  23. 23.3/10 − 1/5 =
  24. 24.4/7 − 1/3 =
  25. 25.1/2 − 2/9 =
  26. 26.A bottle has 1/2 litre of juice. Aarav drinks 2/9 litre. How much juice is left (in litres)? =
  27. 27.3/4 − 2/5 =
  28. 28.A bottle has 9/10 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  29. 29.9/10 − 3/5 =
  30. 30.3/5 − 1/3 =
  31. 31.2/3 − 1/8 =
  32. 32.A bottle has 7/10 litre of juice. Vihaan drinks 3/5 litre. How much juice is left (in litres)? =
  33. 33.1/4 − 1/10 =
  34. 34.A bottle has 2/3 litre of juice. Riya drinks 2/9 litre. How much juice is left (in litres)? =
  35. 35.Kabir has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 5/6 litre of juice. Sara drinks 3/4 litre. How much juice is left (in litres)? =
  37. 37.2/3 − 3/5 =
  38. 38.7/9 − 1/3 =
  39. 39.Vihaan has a ribbon 4/5 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  40. 40.8/9 − 2/3 =

Answer key

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

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