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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 230 · 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. 1.1/2 − 3/10 =
  2. 2.A bottle has 3/4 litre of juice. Rohan drinks 3/7 litre. How much juice is left (in litres)? =
  3. 3.4/7 − 1/3 =
  4. 4.A bottle has 5/6 litre of juice. Ishaan drinks 3/8 litre. How much juice is left (in litres)? =
  5. 5.1/2 − 3/7 =
  6. 6.A tank is 3/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 7/10 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 7/10 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  9. 9.Tara has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  11. 11.4/7 − 1/2 =
  12. 12.5/6 − 2/3 =
  13. 13.7/10 − 1/2 =
  14. 14.3/4 − 5/8 =
  15. 15.Arjun has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  16. 16.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? =
  17. 17.A bottle has 4/5 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.4/5 − 1/10 =
  19. 19.2/5 − 1/10 =
  20. 20.Aarav has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  21. 21.5/8 − 1/4 =
  22. 22.8/9 − 1/6 =
  23. 23.A bottle has 3/4 litre of juice. Rohan drinks 5/7 litre. How much juice is left (in litres)? =
  24. 24.7/10 − 3/5 =
  25. 25.9/10 − 1/3 =
  26. 26.2/3 − 2/9 =
  27. 27.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  28. 28.1/4 − 1/10 =
  29. 29.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? =
  30. 30.2/3 − 3/10 =
  31. 31.2/3 − 4/7 =
  32. 32.3/7 − 1/4 =
  33. 33.8/9 − 1/3 =
  34. 34.1/5 − 1/10 =
  35. 35.3/10 − 1/6 =
  36. 36.7/9 − 1/6 =
  37. 37.Diya has a ribbon 5/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 1/2 litre of juice. Diya drinks 2/5 litre. How much juice is left (in litres)? =
  39. 39.7/10 − 1/6 =
  40. 40.1/2 − 1/3 =

Answer key

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

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