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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 169 · 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. 1.2/5 − 3/10 =
  2. 2.7/8 − 1/2 =
  3. 3.Arjun has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  4. 4.5/8 − 1/3 =
  5. 5.1/2 − 1/7 =
  6. 6.A bottle has 2/3 litre of juice. Kabir drinks 3/7 litre. How much juice is left (in litres)? =
  7. 7.8/9 − 1/3 =
  8. 8.A bottle has 2/3 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  9. 9.Aarav has a ribbon 2/3 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  10. 10.1/2 − 2/7 =
  11. 11.2/3 − 2/9 =
  12. 12.A bottle has 1/2 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 4/5 litre of juice. Ishaan drinks 7/10 litre. How much juice is left (in litres)? =
  14. 14.7/10 − 3/5 =
  15. 15.Vihaan has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  16. 16.7/8 − 5/6 =
  17. 17.8/9 − 2/3 =
  18. 18.3/4 − 2/5 =
  19. 19.3/5 − 1/6 =
  20. 20.A tank is 7/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.5/6 − 7/9 =
  22. 22.5/9 − 1/3 =
  23. 23.9/10 − 2/5 =
  24. 24.3/4 − 1/7 =
  25. 25.5/6 − 1/3 =
  26. 26.8/9 − 1/6 =
  27. 27.A bottle has 3/4 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  28. 28.9/10 − 4/5 =
  29. 29.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  30. 30.1/4 − 1/8 =
  31. 31.A bottle has 1/6 litre of juice. Tara drinks 1/9 litre. How much juice is left (in litres)? =
  32. 32.2/9 − 1/6 =
  33. 33.1/2 − 1/3 =
  34. 34.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? =
  35. 35.9/10 − 1/2 =
  36. 36.A bottle has 3/4 litre of juice. Kabir drinks 2/5 litre. How much juice is left (in litres)? =
  37. 37.3/10 − 1/5 =
  38. 38.5/6 − 5/9 =
  39. 39.A bottle has 9/10 litre of juice. Diya drinks 5/6 litre. How much juice is left (in litres)? =
  40. 40.Sara has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =

Answer key

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

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