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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 16 · 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. 1.5/7 − 1/4 =
  2. 2.Rohan has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  3. 3.7/10 − 2/5 =
  4. 4.1/2 − 2/5 =
  5. 5.2/3 − 3/5 =
  6. 6.7/9 − 1/6 =
  7. 7.1/3 − 1/9 =
  8. 8.A bottle has 5/6 litre of juice. Diya drinks 7/10 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 9/10 litre of juice. Kabir drinks 3/5 litre. How much juice is left (in litres)? =
  10. 10.3/4 − 2/7 =
  11. 11.3/4 − 3/8 =
  12. 12.7/8 − 3/4 =
  13. 13.7/10 − 1/2 =
  14. 14.2/3 − 5/8 =
  15. 15.A bottle has 6/7 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.1/2 − 1/10 =
  17. 17.Vihaan has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.1/3 − 1/5 =
  19. 19.1/5 − 1/6 =
  20. 20.7/9 − 1/2 =
  21. 21.Arjun has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  22. 22.2/3 − 2/9 =
  23. 23.A bottle has 1/4 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 8/9 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  25. 25.A bottle has 5/7 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  26. 26.Rohan has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  27. 27.3/4 − 3/7 =
  28. 28.7/10 − 3/5 =
  29. 29.Arjun has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  30. 30.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 7/10 litre of juice. Diya drinks 2/5 litre. How much juice is left (in litres)? =
  32. 32.2/3 − 3/10 =
  33. 33.A bottle has 5/9 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 7/10 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.2/5 − 1/3 =
  36. 36.1/3 − 1/8 =
  37. 37.5/6 − 3/4 =
  38. 38.A bottle has 3/7 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.A tank is 1/2 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  40. 40.8/9 − 1/6 =

Answer key

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

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