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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 90 · 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 − 1/7 =
  2. 2.5/9 − 1/3 =
  3. 3.2/3 − 2/5 =
  4. 4.A bottle has 7/8 litre of juice. Anaya drinks 5/6 litre. How much juice is left (in litres)? =
  5. 5.5/8 − 1/4 =
  6. 6.Kabir has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  7. 7.5/7 − 2/3 =
  8. 8.1/3 − 2/7 =
  9. 9.Vihaan has a ribbon 5/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  10. 10.2/5 − 3/10 =
  11. 11.4/7 − 1/2 =
  12. 12.Ishaan has a ribbon 5/6 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  13. 13.2/3 − 2/9 =
  14. 14.A bottle has 1/2 litre of juice. Ishaan drinks 1/10 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 1/2 =
  16. 16.1/3 − 1/7 =
  17. 17.5/7 − 1/3 =
  18. 18.4/5 − 1/10 =
  19. 19.A bottle has 5/6 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  20. 20.1/2 − 2/5 =
  21. 21.8/9 − 2/3 =
  22. 22.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  23. 23.Rohan has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  24. 24.9/10 − 1/6 =
  25. 25.A bottle has 4/5 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.5/9 − 1/6 =
  27. 27.1/6 − 1/8 =
  28. 28.2/3 − 1/7 =
  29. 29.5/6 − 3/5 =
  30. 30.1/6 − 1/10 =
  31. 31.A bottle has 5/8 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.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? =
  33. 33.5/6 − 1/9 =
  34. 34.3/7 − 1/3 =
  35. 35.1/2 − 1/9 =
  36. 36.A bottle has 5/6 litre of juice. Aarav drinks 5/9 litre. How much juice is left (in litres)? =
  37. 37.6/7 − 1/3 =
  38. 38.8/9 − 5/6 =
  39. 39.3/8 − 1/3 =
  40. 40.Aarav has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =

Answer key

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

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