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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 476 · 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. 2.7/9 − 1/3 =
  3. 3.3/4 − 5/7 =
  4. 4.1/3 − 1/8 =
  5. 5.5/8 − 1/2 =
  6. 6.3/4 − 1/8 =
  7. 7.3/4 − 1/2 =
  8. 8.A bottle has 1/3 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  9. 9.2/3 − 4/9 =
  10. 10.5/6 − 3/10 =
  11. 11.Kabir has a ribbon 5/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 4/5 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  13. 13.7/10 − 2/5 =
  14. 14.2/3 − 1/6 =
  15. 15.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? =
  16. 16.5/7 − 1/4 =
  17. 17.8/9 − 2/3 =
  18. 18.A bottle has 5/6 litre of juice. Meera drinks 2/5 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 3/4 litre of juice. Vihaan drinks 2/5 litre. How much juice is left (in litres)? =
  20. 20.A tank is 3/4 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.3/4 − 2/7 =
  22. 22.A bottle has 2/5 litre of juice. Arjun drinks 3/10 litre. How much juice is left (in litres)? =
  23. 23.5/6 − 1/9 =
  24. 24.A bottle has 5/6 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =
  25. 25.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? =
  26. 26.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? =
  27. 27.2/3 − 5/9 =
  28. 28.1/3 − 3/10 =
  29. 29.1/3 − 1/7 =
  30. 30.1/6 − 1/10 =
  31. 31.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 3/5 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.1/2 − 1/6 =
  34. 34.9/10 − 2/3 =
  35. 35.A bottle has 1/2 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  36. 36.3/8 − 1/4 =
  37. 37.Ishaan has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  38. 38.9/10 − 2/5 =
  39. 39.7/8 − 1/3 =
  40. 40.5/9 − 1/2 =

Answer key

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

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