Answer
$$459 \ mm$$
Work Step by Step
First, we make all of the measurements in mm by multiplying by 10;
$$10.555 \ cm= 105.55\ mm; \quad 13.75 \ cm= 137.5\ mm.$$
Now can add the measurements as follows
$$105.55 \ mm + 9.55 \ mm+ 137.5 \ mm+ 206 \ mm = 458.6 \ mm \approx 459 mm
.$$
