0,351:2,7 +3,05*(13,1-1,72)

To solve the expression \(0.351:2.7 + 3.05 \times (13.1 - 1.72)\), we will follow the order of operations.

1. Calculate the division: \[ 0.351:2.7 = \frac{0.351}{2.7} \approx 0.130 \]

2. Calculate the subtraction inside the parentheses: \[ 13.1 - 1.72 = 11.38 \]

3. Calculate the multiplication: \[ 3.05 \times 11.38 \approx 34.64 \]

4. Add the two results together: \[ 0.130 + 34.64 \approx 34.77 \]

So, the final result is approximately: \[ \boxed{34.77} \]