68,16:3,55+51,4•0,16-28,004

To solve the expression \( 68.16 \div 3.55 + 51.4 \cdot 0.16 - 28.004 \), we will follow the order of operations (PEMDAS/BODMAS):

1. Division and Multiplication first, then Addition and Subtraction.

Let's calculate each part step by step:

1. Division: \[ 68.16 \div 3.55 \approx 19.2186 \]

2. Multiplication: \[ 51.4 \cdot 0.16 \approx 8.224 \]

Now substitute these values back into the expression:

\[ 19.2186 + 8.224 - 28.004 \]

3. Addition: \[ 19.2186 + 8.224 \approx 27.4426 \]

4. Subtraction: \[ 27.4426 - 28.004 \approx -0.5614 \]

So, the final result of the expression \( 68.16 \div 3.55 + 51.4 \cdot 0.16 - 28.004 \) is approximately:

\[ \boxed{-0.5614} \]