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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 867 · 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. 1.7/10 − 2/3 =
  2. 2.3/4 − 4/7 =
  3. 3.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 2/9 =
  5. 5.A bottle has 7/9 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  6. 6.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? =
  7. 7.7/8 − 1/2 =
  8. 8.8/9 − 2/3 =
  9. 9.3/4 − 3/7 =
  10. 10.5/7 − 1/4 =
  11. 11.3/4 − 2/3 =
  12. 12.4/5 − 1/10 =
  13. 13.A bottle has 1/2 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  14. 14.3/4 − 5/8 =
  15. 15.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  16. 16.3/8 − 1/4 =
  17. 17.4/7 − 1/3 =
  18. 18.A bottle has 2/3 litre of juice. Riya drinks 1/9 litre. How much juice is left (in litres)? =
  19. 19.2/3 − 1/9 =
  20. 20.2/5 − 1/4 =
  21. 21.2/3 − 2/7 =
  22. 22.A tank is 7/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  23. 23.7/8 − 3/4 =
  24. 24.1/2 − 1/8 =
  25. 25.Anaya has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  26. 26.Vihaan has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  27. 27.1/3 − 1/5 =
  28. 28.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.2/3 − 5/8 =
  30. 30.1/4 − 1/8 =
  31. 31.5/6 − 1/9 =
  32. 32.5/8 − 1/4 =
  33. 33.2/5 − 1/6 =
  34. 34.1/3 − 1/9 =
  35. 35.A bottle has 5/6 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  36. 36.5/7 − 1/3 =
  37. 37.5/9 − 1/2 =
  38. 38.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  39. 39.3/4 − 1/7 =
  40. 40.A bottle has 3/4 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =

Answer key

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

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