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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 365 · 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. 1.2/9 − 1/6 =
  2. 2.2/7 − 1/4 =
  3. 3.A bottle has 1/2 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 9/10 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  5. 5.2/3 − 4/7 =
  6. 6.1/2 − 2/9 =
  7. 7.5/7 − 1/4 =
  8. 8.1/2 − 2/5 =
  9. 9.A bottle has 2/3 litre of juice. Sara drinks 1/9 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 1/2 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  11. 11.5/6 − 4/9 =
  12. 12.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  13. 13.4/5 − 1/6 =
  14. 14.A bottle has 5/8 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  15. 15.1/5 − 1/10 =
  16. 16.3/4 − 5/7 =
  17. 17.1/3 − 2/7 =
  18. 18.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  19. 19.7/10 − 2/5 =
  20. 20.A bottle has 3/5 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.Diya has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 3/4 litre of juice. Arjun drinks 1/10 litre. How much juice is left (in litres)? =
  23. 23.7/8 − 3/4 =
  24. 24.A bottle has 7/10 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  25. 25.1/2 − 3/10 =
  26. 26.5/7 − 2/3 =
  27. 27.1/2 − 1/7 =
  28. 28.A bottle has 5/6 litre of juice. Arjun drinks 7/9 litre. How much juice is left (in litres)? =
  29. 29.7/10 − 3/5 =
  30. 30.5/6 − 1/5 =
  31. 31.1/4 − 1/10 =
  32. 32.5/6 − 1/9 =
  33. 33.1/3 − 2/9 =
  34. 34.4/9 − 1/6 =
  35. 35.A bottle has 2/5 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.5/6 − 1/4 =
  37. 37.3/5 − 1/3 =
  38. 38.Meera has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  39. 39.Ishaan has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  40. 40.1/5 − 1/6 =

Answer key

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

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