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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 183 · 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. 1.6/7 − 1/2 =
  2. 2.8/9 − 5/6 =
  3. 3.Riya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  4. 4.3/4 − 1/3 =
  5. 5.Kabir has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 2/3 litre of juice. Kabir drinks 5/9 litre. How much juice is left (in litres)? =
  8. 8.5/9 − 1/6 =
  9. 9.1/3 − 2/9 =
  10. 10.1/2 − 1/8 =
  11. 11.1/2 − 4/9 =
  12. 12.Ishaan has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  13. 13.3/5 − 3/10 =
  14. 14.3/7 − 1/4 =
  15. 15.3/8 − 1/4 =
  16. 16.2/3 − 4/9 =
  17. 17.A bottle has 5/6 litre of juice. Sara drinks 2/9 litre. How much juice is left (in litres)? =
  18. 18.3/4 − 2/3 =
  19. 19.3/4 − 1/8 =
  20. 20.2/5 − 1/6 =
  21. 21.7/8 − 1/4 =
  22. 22.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.A bottle has 2/3 litre of juice. Anaya drinks 4/7 litre. How much juice is left (in litres)? =
  24. 24.5/6 − 1/8 =
  25. 25.8/9 − 1/3 =
  26. 26.7/8 − 1/2 =
  27. 27.9/10 − 4/5 =
  28. 28.1/3 − 1/7 =
  29. 29.Riya has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  30. 30.7/9 − 2/3 =
  31. 31.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  32. 32.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  33. 33.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? =
  34. 34.A bottle has 7/10 litre of juice. Sara drinks 2/3 litre. How much juice is left (in litres)? =
  35. 35.A tank is 5/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  36. 36.2/3 − 4/7 =
  37. 37.8/9 − 1/6 =
  38. 38.1/2 − 3/7 =
  39. 39.7/10 − 1/3 =
  40. 40.5/6 − 1/9 =

Answer key

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

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