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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 657 · 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 − 1/4 =
  2. 2.A bottle has 6/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.2/9 − 1/6 =
  4. 4.4/5 − 2/3 =
  5. 5.A bottle has 5/6 litre of juice. Diya drinks 7/9 litre. How much juice is left (in litres)? =
  6. 6.2/3 − 3/7 =
  7. 7.8/9 − 5/6 =
  8. 8.1/2 − 4/9 =
  9. 9.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? =
  10. 10.A bottle has 4/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 3/4 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =
  12. 12.A bottle has 2/3 litre of juice. Riya drinks 3/7 litre. How much juice is left (in litres)? =
  13. 13.3/4 − 7/10 =
  14. 14.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  15. 15.A bottle has 7/10 litre of juice. Diya drinks 2/5 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 3/4 litre of juice. Riya drinks 3/7 litre. How much juice is left (in litres)? =
  17. 17.3/4 − 2/7 =
  18. 18.Ishaan has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 1/9 =
  20. 20.1/3 − 2/7 =
  21. 21.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/2 − 3/8 =
  23. 23.1/5 − 1/10 =
  24. 24.3/4 − 1/8 =
  25. 25.3/8 − 1/4 =
  26. 26.3/5 − 3/10 =
  27. 27.3/10 − 1/5 =
  28. 28.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.7/10 − 1/5 =
  30. 30.A bottle has 1/6 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  31. 31.3/7 − 1/3 =
  32. 32.A bottle has 5/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  33. 33.1/4 − 1/7 =
  34. 34.9/10 − 5/6 =
  35. 35.A bottle has 6/7 litre of juice. Arjun drinks 3/4 litre. How much juice is left (in litres)? =
  36. 36.2/5 − 1/6 =
  37. 37.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  38. 38.1/3 − 3/10 =
  39. 39.1/3 − 2/9 =
  40. 40.1/3 − 1/8 =

Answer key

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

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