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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 316 · 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 − 3/5 =
  2. 2.3/7 − 1/3 =
  3. 3.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? =
  4. 4.7/10 − 2/3 =
  5. 5.1/2 − 1/3 =
  6. 6.1/3 − 2/7 =
  7. 7.Diya has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  8. 8.A bottle has 2/3 litre of juice. Rohan drinks 5/8 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 5/6 litre of juice. Ishaan drinks 3/8 litre. How much juice is left (in litres)? =
  10. 10.Arjun has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  12. 12.Sara has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  13. 13.3/4 − 1/2 =
  14. 14.Sara has a ribbon 7/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  15. 15.A bottle has 5/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.2/3 − 3/8 =
  17. 17.7/8 − 3/4 =
  18. 18.Meera has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  19. 19.3/4 − 3/7 =
  20. 20.A bottle has 3/10 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  21. 21.4/7 − 1/3 =
  22. 22.6/7 − 1/3 =
  23. 23.3/4 − 5/8 =
  24. 24.9/10 − 1/6 =
  25. 25.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 5/6 litre of juice. Sara drinks 2/9 litre. How much juice is left (in litres)? =
  27. 27.9/10 − 1/5 =
  28. 28.9/10 − 1/3 =
  29. 29.2/5 − 1/3 =
  30. 30.Kabir has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  31. 31.2/3 − 1/6 =
  32. 32.Vihaan has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  33. 33.1/3 − 1/8 =
  34. 34.A bottle has 9/10 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  35. 35.2/5 − 1/4 =
  36. 36.3/10 − 1/5 =
  37. 37.5/6 − 1/10 =
  38. 38.A bottle has 5/6 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  39. 39.A bottle has 4/5 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  40. 40.1/4 − 1/6 =

Answer key

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

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