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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 402 · 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. 1.2/3 − 2/5 =
  2. 2.2/3 − 4/7 =
  3. 3.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.8/9 − 1/2 =
  5. 5.A bottle has 2/3 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  6. 6.5/6 − 1/5 =
  7. 7.A bottle has 2/3 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  8. 8.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  9. 9.1/2 − 2/9 =
  10. 10.2/7 − 1/4 =
  11. 11.2/5 − 3/10 =
  12. 12.5/8 − 1/4 =
  13. 13.Ishaan has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  14. 14.3/5 − 3/10 =
  15. 15.7/8 − 3/4 =
  16. 16.A tank is 1/4 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  17. 17.A bottle has 7/10 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.9/10 − 2/3 =
  19. 19.A bottle has 8/9 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 1/6 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  21. 21.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  22. 22.A bottle has 4/5 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 4/9 =
  24. 24.2/3 − 5/8 =
  25. 25.A tank is 8/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  26. 26.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 5/6 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =
  28. 28.6/7 − 1/2 =
  29. 29.3/4 − 2/7 =
  30. 30.A bottle has 4/9 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.Riya has a ribbon 3/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.2/5 − 1/6 =
  33. 33.A bottle has 1/2 litre of juice. Sara drinks 3/7 litre. How much juice is left (in litres)? =
  34. 34.Diya has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.7/9 − 2/3 =
  36. 36.9/10 − 5/6 =
  37. 37.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  38. 38.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? =
  39. 39.5/9 − 1/3 =
  40. 40.3/8 − 1/4 =

Answer key

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

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