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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 516 · 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. 1.1/5 − 1/10 =
  2. 2.A bottle has 1/3 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  3. 3.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  4. 4.A tank is 9/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.Ishaan has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  6. 6.1/3 − 1/9 =
  7. 7.7/9 − 1/2 =
  8. 8.2/3 − 2/5 =
  9. 9.Meera has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  10. 10.7/10 − 1/5 =
  11. 11.Vihaan has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  12. 12.4/5 − 2/3 =
  13. 13.7/9 − 2/3 =
  14. 14.Kabir has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  15. 15.6/7 − 1/3 =
  16. 16.Arjun has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  17. 17.1/2 − 3/10 =
  18. 18.6/7 − 2/3 =
  19. 19.3/4 − 1/3 =
  20. 20.1/2 − 1/5 =
  21. 21.Aarav has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  22. 22.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  23. 23.5/7 − 2/3 =
  24. 24.3/4 − 5/8 =
  25. 25.7/9 − 1/3 =
  26. 26.5/7 − 1/2 =
  27. 27.1/6 − 1/9 =
  28. 28.1/2 − 1/7 =
  29. 29.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  30. 30.1/3 − 3/10 =
  31. 31.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  32. 32.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 3/4 litre of juice. Meera drinks 3/8 litre. How much juice is left (in litres)? =
  34. 34.8/9 − 1/6 =
  35. 35.5/6 − 3/4 =
  36. 36.3/4 − 3/7 =
  37. 37.5/6 − 1/9 =
  38. 38.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  39. 39.7/10 − 1/4 =
  40. 40.1/2 − 2/5 =

Answer key

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

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