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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 708 · 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. 1.3/4 − 1/5 =
  2. 2.2/3 − 1/9 =
  3. 3.2/3 − 1/6 =
  4. 4.1/4 − 1/10 =
  5. 5.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  6. 6.A tank is 2/3 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 5/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 5/9 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 1/2 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  10. 10.Meera has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  11. 11.4/7 − 1/3 =
  12. 12.3/4 − 5/7 =
  13. 13.Rohan has a ribbon 1/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  14. 14.3/7 − 1/4 =
  15. 15.A tank is 2/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  16. 16.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 1/2 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  19. 19.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 3/4 litre of juice. Meera drinks 3/7 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 1/4 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  22. 22.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  23. 23.1/3 − 1/7 =
  24. 24.4/9 − 1/3 =
  25. 25.5/7 − 1/2 =
  26. 26.Diya has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  27. 27.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  28. 28.Ishaan has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  29. 29.A tank is 1/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  30. 30.A bottle has 6/7 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  31. 31.5/6 − 1/9 =
  32. 32.1/2 − 1/8 =
  33. 33.Aarav has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  34. 34.5/6 − 3/8 =
  35. 35.8/9 − 5/6 =
  36. 36.Diya has a ribbon 1/3 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 2/5 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  38. 38.Meera has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  40. 40.3/5 − 1/3 =

Answer key

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

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