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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 531 · 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. 1.1/6 − 1/9 =
  2. 2.2/3 − 3/7 =
  3. 3.A bottle has 3/5 litre of juice. Diya drinks 3/10 litre. How much juice is left (in litres)? =
  4. 4.4/5 − 2/3 =
  5. 5.A bottle has 7/10 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 5/6 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  7. 7.2/5 − 1/3 =
  8. 8.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 4/7 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  10. 10.9/10 − 1/5 =
  11. 11.A tank is 3/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  12. 12.5/6 − 1/10 =
  13. 13.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.Diya has a ribbon 5/6 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  15. 15.Kabir has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  16. 16.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  17. 17.5/7 − 1/2 =
  18. 18.A bottle has 2/3 litre of juice. Vihaan drinks 2/7 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 7/10 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.1/2 − 2/7 =
  21. 21.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/6 − 1/10 =
  23. 23.3/4 − 3/7 =
  24. 24.3/4 − 1/7 =
  25. 25.7/10 − 2/3 =
  26. 26.5/6 − 1/5 =
  27. 27.Ishaan has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  28. 28.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.7/8 − 3/4 =
  30. 30.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  31. 31.1/3 − 1/10 =
  32. 32.5/7 − 1/3 =
  33. 33.3/7 − 1/4 =
  34. 34.7/8 − 1/2 =
  35. 35.1/2 − 1/4 =
  36. 36.3/4 − 3/8 =
  37. 37.Meera has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  38. 38.9/10 − 4/5 =
  39. 39.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? =
  40. 40.A bottle has 3/7 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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