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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 307 · 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. 1.9/10 − 2/5 =
  2. 2.Vihaan has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 5/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  4. 4.7/10 − 1/6 =
  5. 5.9/10 − 1/2 =
  6. 6.5/9 − 1/6 =
  7. 7.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  8. 8.5/6 − 5/8 =
  9. 9.5/6 − 2/9 =
  10. 10.5/7 − 1/2 =
  11. 11.7/8 − 3/4 =
  12. 12.3/5 − 3/10 =
  13. 13.Kabir has a ribbon 2/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  14. 14.5/6 − 5/9 =
  15. 15.1/2 − 3/8 =
  16. 16.A tank is 3/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  17. 17.4/5 − 1/6 =
  18. 18.4/9 − 1/3 =
  19. 19.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  20. 20.Ishaan has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  21. 21.2/3 − 2/7 =
  22. 22.A tank is 4/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/8 − 1/6 =
  24. 24.5/8 − 1/3 =
  25. 25.Sara has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  26. 26.1/2 − 1/5 =
  27. 27.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? =
  28. 28.7/10 − 1/5 =
  29. 29.Kabir has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  30. 30.9/10 − 2/3 =
  31. 31.A bottle has 1/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  32. 32.6/7 − 1/2 =
  33. 33.4/5 − 3/10 =
  34. 34.3/4 − 2/3 =
  35. 35.A bottle has 5/6 litre of juice. Meera drinks 4/5 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 1/4 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  37. 37.1/2 − 3/10 =
  38. 38.9/10 − 1/6 =
  39. 39.1/4 − 1/8 =
  40. 40.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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