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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 771 · 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. 1.8/9 − 1/2 =
  2. 2.4/5 − 7/10 =
  3. 3.A bottle has 4/9 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  4. 4.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? =
  5. 5.8/9 − 1/3 =
  6. 6.3/4 − 7/10 =
  7. 7.Tara has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  8. 8.A bottle has 3/5 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  9. 9.5/6 − 1/10 =
  10. 10.7/9 − 1/6 =
  11. 11.6/7 − 1/3 =
  12. 12.2/3 − 1/9 =
  13. 13.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  14. 14.3/4 − 3/8 =
  15. 15.7/10 − 3/5 =
  16. 16.1/3 − 1/9 =
  17. 17.1/4 − 1/7 =
  18. 18.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  19. 19.4/7 − 1/3 =
  20. 20.2/3 − 5/8 =
  21. 21.7/10 − 1/4 =
  22. 22.9/10 − 4/5 =
  23. 23.1/2 − 1/10 =
  24. 24.2/3 − 3/7 =
  25. 25.5/7 − 1/3 =
  26. 26.5/6 − 3/5 =
  27. 27.3/4 − 4/7 =
  28. 28.4/5 − 1/3 =
  29. 29.7/8 − 3/4 =
  30. 30.2/5 − 1/6 =
  31. 31.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 4/5 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 9/10 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  34. 34.5/8 − 1/6 =
  35. 35.Arjun has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  36. 36.2/3 − 2/5 =
  37. 37.6/7 − 1/4 =
  38. 38.1/6 − 1/10 =
  39. 39.A bottle has 1/2 litre of juice. Meera drinks 2/7 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 1/2 litre of juice. Vihaan drinks 1/7 litre. How much juice is left (in litres)? =

Answer key

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

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