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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 111 · 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. 1.5/6 − 2/5 =
  2. 2.2/3 − 5/8 =
  3. 3.8/9 − 2/3 =
  4. 4.Rohan has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  5. 5.5/9 − 1/3 =
  6. 6.7/10 − 2/5 =
  7. 7.A bottle has 3/5 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.1/2 − 1/5 =
  9. 9.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 3/4 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 3/4 litre of juice. Kabir drinks 5/7 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 4/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  13. 13.7/10 − 2/3 =
  14. 14.A bottle has 3/4 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 1/8 =
  16. 16.7/8 − 1/3 =
  17. 17.3/4 − 3/7 =
  18. 18.1/3 − 3/10 =
  19. 19.3/4 − 1/5 =
  20. 20.A tank is 3/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  21. 21.8/9 − 1/3 =
  22. 22.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  23. 23.A tank is 7/10 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  24. 24.A bottle has 5/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.2/5 − 1/4 =
  26. 26.5/6 − 1/4 =
  27. 27.A bottle has 5/7 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  28. 28.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  29. 29.6/7 − 2/3 =
  30. 30.Kabir has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  31. 31.5/6 − 1/9 =
  32. 32.2/5 − 1/3 =
  33. 33.Diya has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  34. 34.9/10 − 5/6 =
  35. 35.4/5 − 3/4 =
  36. 36.Tara has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  37. 37.A bottle has 3/10 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  38. 38.4/5 − 1/2 =
  39. 39.7/8 − 3/4 =
  40. 40.A bottle has 1/2 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =

Answer key

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

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