355,1:0,67+0,83•15=

To solve the expression \( 355.1:0.67 + 0.83 \cdot 15 \), we will follow the order of operations (division and multiplication first, then addition).

1. Start with the division: \[ 355.1 \div 0.67 \approx 530.15 \]

2. Next, calculate the multiplication: \[ 0.83 \cdot 15 \approx 12.45 \]

3. Now, add the two results together: \[ 530.15 + 12.45 \approx 542.60 \]

So, the final result is approximately \( 542.60 \).