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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 641 · 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 − 2/3 =
  2. 2.6/7 − 1/3 =
  3. 3.8/9 − 1/6 =
  4. 4.A tank is 7/8 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  5. 5.4/5 − 3/4 =
  6. 6.3/4 − 5/8 =
  7. 7.4/7 − 1/2 =
  8. 8.4/5 − 1/2 =
  9. 9.1/3 − 1/5 =
  10. 10.1/2 − 1/3 =
  11. 11.9/10 − 2/5 =
  12. 12.5/6 − 4/9 =
  13. 13.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  14. 14.5/6 − 3/8 =
  15. 15.5/6 − 1/10 =
  16. 16.A bottle has 9/10 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.3/4 − 1/6 =
  18. 18.9/10 − 5/6 =
  19. 19.1/3 − 2/9 =
  20. 20.7/8 − 5/6 =
  21. 21.6/7 − 1/2 =
  22. 22.1/2 − 3/7 =
  23. 23.7/10 − 2/3 =
  24. 24.8/9 − 1/3 =
  25. 25.2/3 − 1/6 =
  26. 26.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/3 − 1/4 =
  28. 28.5/6 − 2/9 =
  29. 29.Kabir has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  30. 30.5/6 − 1/5 =
  31. 31.Sara has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  32. 32.Anaya has a ribbon 3/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 7/8 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 2/3 litre of juice. Kabir drinks 4/7 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 7/10 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 5/8 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  37. 37.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.Aarav has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  39. 39.A bottle has 7/9 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.1/2 − 1/8 =

Answer key

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

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