There are total: \(25.2=50\left(shoes\right)\).

Because it needs one shoe for each of it's 100 feet, than the centipede must buy:

\(100-50=50\left(shoes\right)\) or \(25\) pairs of shoes.

So the answer is \(50\left(shoes\right)\) or \(25\) pairs of shoes.

The cencipede must buy :

       ( 100 : 2 ) - 25 = 25 ( pair of shoes )

The answer is : 25 pair of shoes. Right ???