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Adding Fractions with Different Denominators Worksheet

Fractions lesson 15: Adding fractions: different denominators · Set 88 · 40 questions
TalentJR

The method (LCM first): Find the LCM of the two bottom numbers. Change each fraction to that bottom number (multiply its top and bottom by the same number). Add the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.1/4 + 2/3 =
  2. 2.1/10 + 1/3 =
  3. 3.7/10 + 3/5 =
  4. 4.A recipe needs 3/7 kg of flour and 2/3 kg of sugar. How much is that in all (in kg)? =
  5. 5.Anaya walks 4/9 km to the park and then 2/3 km to the shop. How far does Anaya walk in all (in km)? =
  6. 6.1/4 + 1/10 =
  7. 7.A jug has 1/4 litre of milk. Aarav pours in 3/7 litre more. How much milk is in the jug now (in litres)? =
  8. 8.A jug has 1/5 litre of milk. Diya pours in 1/4 litre more. How much milk is in the jug now (in litres)? =
  9. 9.1/9 + 1/2 =
  10. 10.A recipe needs 3/10 kg of flour and 1/4 kg of sugar. How much is that in all (in kg)? =
  11. 11.4/5 + 7/10 =
  12. 12.1/2 + 1/6 =
  13. 13.A jug has 2/5 litre of milk. Rohan pours in 1/3 litre more. How much milk is in the jug now (in litres)? =
  14. 14.A recipe needs 1/6 kg of flour and 4/5 kg of sugar. How much is that in all (in kg)? =
  15. 15.1/8 + 3/4 =
  16. 16.3/10 + 4/5 =
  17. 17.A jug has 7/9 litre of milk. Tara pours in 1/3 litre more. How much milk is in the jug now (in litres)? =
  18. 18.4/5 + 9/10 =
  19. 19.2/3 + 5/7 =
  20. 20.5/8 + 1/6 =
  21. 21.A recipe needs 7/10 kg of flour and 5/6 kg of sugar. How much is that in all (in kg)? =
  22. 22.3/4 + 7/10 =
  23. 23.Aarav walks 9/10 km to the park and then 3/4 km to the shop. How far does Aarav walk in all (in km)? =
  24. 24.9/10 + 2/3 =
  25. 25.2/5 + 3/4 =
  26. 26.9/10 + 1/2 =
  27. 27.Rohan walks 4/5 km to the park and then 9/10 km to the shop. How far does Rohan walk in all (in km)? =
  28. 28.2/7 + 2/3 =
  29. 29.7/10 + 1/3 =
  30. 30.7/8 + 1/6 =
  31. 31.9/10 + 5/6 =
  32. 32.1/4 + 2/7 =
  33. 33.5/8 + 3/4 =
  34. 34.A recipe needs 7/8 kg of flour and 1/2 kg of sugar. How much is that in all (in kg)? =
  35. 35.3/4 + 1/3 =
  36. 36.8/9 + 1/6 =
  37. 37.A jug has 2/3 litre of milk. Diya pours in 3/5 litre more. How much milk is in the jug now (in litres)? =
  38. 38.1/2 + 4/5 =
  39. 39.A jug has 2/5 litre of milk. Anaya pours in 2/3 litre more. How much milk is in the jug now (in litres)? =
  40. 40.A jug has 7/9 litre of milk. Tara pours in 2/3 litre more. How much milk is in the jug now (in litres)? =

Answer key

  1. 11/12
  2. 13/30
  3. 13/10
  4. 23/21
  5. 10/9
  6. 7/20
  7. 19/28
  8. 9/20
  9. 11/18
  10. 11/20
  11. 3/2
  12. 2/3
  13. 11/15
  14. 29/30
  15. 7/8
  16. 11/10
  17. 10/9
  18. 17/10
  19. 29/21
  20. 19/24
  21. 23/15
  22. 29/20
  23. 33/20
  24. 47/30
  25. 23/20
  26. 7/5
  27. 17/10
  28. 20/21
  29. 31/30
  30. 25/24
  31. 26/15
  32. 15/28
  33. 11/8
  34. 11/8
  35. 13/12
  36. 19/18
  37. 19/15
  38. 13/10
  39. 16/15
  40. 13/9

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