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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 246 · 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 − 1/10 =
  2. 2.A bottle has 2/3 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  3. 3.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  4. 4.Diya has a ribbon 7/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  5. 5.2/3 − 2/7 =
  6. 6.A bottle has 1/3 litre of juice. Kabir drinks 1/7 litre. How much juice is left (in litres)? =
  7. 7.4/7 − 1/4 =
  8. 8.5/8 − 1/3 =
  9. 9.3/5 − 1/4 =
  10. 10.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  11. 11.A bottle has 2/3 litre of juice. Sara drinks 5/9 litre. How much juice is left (in litres)? =
  12. 12.7/8 − 3/4 =
  13. 13.A bottle has 8/9 litre of juice. Vihaan drinks 5/6 litre. How much juice is left (in litres)? =
  14. 14.Kabir has a ribbon 1/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  15. 15.A bottle has 3/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.7/10 − 1/6 =
  17. 17.1/5 − 1/10 =
  18. 18.1/2 − 1/9 =
  19. 19.Riya has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  20. 20.A tank is 1/2 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  21. 21.6/7 − 1/2 =
  22. 22.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.5/7 − 2/3 =
  24. 24.4/9 − 1/3 =
  25. 25.2/3 − 5/9 =
  26. 26.A tank is 1/2 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  27. 27.5/6 − 4/5 =
  28. 28.1/3 − 1/7 =
  29. 29.A bottle has 3/7 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.2/3 − 3/10 =
  31. 31.7/8 − 1/3 =
  32. 32.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  33. 33.3/10 − 1/6 =
  34. 34.A bottle has 4/5 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  35. 35.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  36. 36.5/8 − 1/6 =
  37. 37.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.1/3 − 1/4 =
  39. 39.2/3 − 1/5 =
  40. 40.7/9 − 1/2 =

Answer key

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

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