Question

Round to the nearest thosanth 342.490654086

Answer 1

I assume it's "thousandth".

$342.490654086\approx342.491$

Answer 2

342.490654086
          ^ This is the thousandths place.
Rounding it will give us:

342.491

Because the number that comes after it is 6, so we round up to 342.491.