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Adding Fractions with Different Denominators Worksheet

Fractions lesson 15: Adding fractions: different denominators · Set 15 · 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.A recipe needs 1/9 kg of flour and 1/3 kg of sugar. How much is that in all (in kg)? =
  2. 2.5/7 + 1/2 =
  3. 3.A jug has 3/7 litre of milk. Diya pours in 1/4 litre more. How much milk is in the jug now (in litres)? =
  4. 4.2/9 + 5/6 =
  5. 5.A recipe needs 3/10 kg of flour and 1/6 kg of sugar. How much is that in all (in kg)? =
  6. 6.4/5 + 7/10 =
  7. 7.6/7 + 3/4 =
  8. 8.3/4 + 1/8 =
  9. 9.A recipe needs 6/7 kg of flour and 1/2 kg of sugar. How much is that in all (in kg)? =
  10. 10.1/3 + 3/8 =
  11. 11.A jug has 5/8 litre of milk. Rohan pours in 5/6 litre more. How much milk is in the jug now (in litres)? =
  12. 12.3/10 + 1/5 =
  13. 13.A jug has 2/3 litre of milk. Kabir pours in 2/9 litre more. How much milk is in the jug now (in litres)? =
  14. 14.A recipe needs 8/9 kg of flour and 1/6 kg of sugar. How much is that in all (in kg)? =
  15. 15.1/10 + 4/5 =
  16. 16.Tara walks 4/7 km to the park and then 1/2 km to the shop. How far does Tara walk in all (in km)? =
  17. 17.3/8 + 1/3 =
  18. 18.5/8 + 3/4 =
  19. 19.Riya walks 2/7 km to the park and then 1/3 km to the shop. How far does Riya walk in all (in km)? =
  20. 20.Diya walks 1/5 km to the park and then 3/4 km to the shop. How far does Diya walk in all (in km)? =
  21. 21.5/8 + 2/3 =
  22. 22.1/7 + 2/3 =
  23. 23.1/2 + 7/8 =
  24. 24.A recipe needs 1/3 kg of flour and 8/9 kg of sugar. How much is that in all (in kg)? =
  25. 25.A jug has 2/3 litre of milk. Sara pours in 1/2 litre more. How much milk is in the jug now (in litres)? =
  26. 26.A jug has 5/7 litre of milk. Riya pours in 1/2 litre more. How much milk is in the jug now (in litres)? =
  27. 27.4/5 + 3/4 =
  28. 28.3/5 + 2/3 =
  29. 29.A jug has 1/6 litre of milk. Vihaan pours in 5/8 litre more. How much milk is in the jug now (in litres)? =
  30. 30.3/5 + 1/2 =
  31. 31.8/9 + 5/6 =
  32. 32.2/3 + 5/6 =
  33. 33.2/3 + 5/8 =
  34. 34.3/7 + 3/4 =
  35. 35.A recipe needs 1/7 kg of flour and 1/3 kg of sugar. How much is that in all (in kg)? =
  36. 36.A recipe needs 4/7 kg of flour and 1/4 kg of sugar. How much is that in all (in kg)? =
  37. 37.4/5 + 1/10 =
  38. 38.A jug has 2/3 litre of milk. Tara pours in 4/5 litre more. How much milk is in the jug now (in litres)? =
  39. 39.2/5 + 1/10 =
  40. 40.4/5 + 2/3 =

Answer key

  1. 4/9
  2. 17/14
  3. 19/28
  4. 19/18
  5. 7/15
  6. 3/2
  7. 45/28
  8. 7/8
  9. 19/14
  10. 17/24
  11. 35/24
  12. 1/2
  13. 8/9
  14. 19/18
  15. 9/10
  16. 15/14
  17. 17/24
  18. 11/8
  19. 13/21
  20. 19/20
  21. 31/24
  22. 17/21
  23. 11/8
  24. 11/9
  25. 7/6
  26. 17/14
  27. 31/20
  28. 19/15
  29. 19/24
  30. 11/10
  31. 31/18
  32. 3/2
  33. 31/24
  34. 33/28
  35. 10/21
  36. 23/28
  37. 9/10
  38. 22/15
  39. 1/2
  40. 22/15

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