Answer: There are 30 nails in 2.5 pounds.
Explanation:
Given : The weight of 1 dozen nails = 1 pound
We know that 1 dozen has 12 units .
It mean the weight of 12 nails = 1 pound
Or we can write ,
The number of nails in 1 pound = 12
Then, the number of nails in 2.5 pounds =
[Using multiplication operation]
Therefore , there are 30 nails in 2.5 pounds.