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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 718 · 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. 1.2/5 − 1/6 =
  2. 2.8/9 − 2/3 =
  3. 3.4/5 − 1/3 =
  4. 4.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  5. 5.1/2 − 1/7 =
  6. 6.A bottle has 3/4 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  7. 7.2/3 − 1/9 =
  8. 8.Tara has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  9. 9.5/6 − 1/5 =
  10. 10.Kabir has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 3/4 litre of juice. Kabir drinks 3/8 litre. How much juice is left (in litres)? =
  13. 13.7/8 − 1/4 =
  14. 14.Tara has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  15. 15.A bottle has 9/10 litre of juice. Riya drinks 2/5 litre. How much juice is left (in litres)? =
  16. 16.2/5 − 3/10 =
  17. 17.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  18. 18.4/5 − 7/10 =
  19. 19.A bottle has 4/7 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  20. 20.3/4 − 4/7 =
  21. 21.4/5 − 2/3 =
  22. 22.Aarav has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  23. 23.5/9 − 1/3 =
  24. 24.A bottle has 8/9 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.2/7 − 1/4 =
  26. 26.3/4 − 2/5 =
  27. 27.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  28. 28.A tank is 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.2/3 − 5/8 =
  30. 30.A bottle has 1/3 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  31. 31.7/10 − 2/5 =
  32. 32.1/6 − 1/10 =
  33. 33.2/3 − 3/7 =
  34. 34.A bottle has 5/7 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  35. 35.7/10 − 1/5 =
  36. 36.Meera has a ribbon 5/6 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  37. 37.7/10 − 3/5 =
  38. 38.2/5 − 1/4 =
  39. 39.4/5 − 3/4 =
  40. 40.A tank is 5/6 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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