The number is already rounded to a greater extent than that!
1.50 rounded to nearest 10th is 1.5.
34.35 rounded to the nearest 10th is 34.4
450
37.5552 rounded to the nearest 10th = 37.6
As is. It is already rounded to the nearest tens place.
450
You do nothing. 450 is already rounded to the nearest ten.
It is 20.0 and not 19.9
450
450
450
450