well, when you are rounding to tenths, you are rounding the numeral directly to the right of the decimal either up to the next highest numeral, or you are leaving it as is. if the second number after the decimal (the hundredths place) is 5 or higher, you round up. If 4 or lower, you round down. You only check that number, and no others, when rounding up at this level of thinking.
so, as a result, 8.38 rounded to the nearest tenth is 8.4
if it were 8.345, it would be 8.3 rounded to the nearest tenths even though rounded to the hundredths it would be 8.35 and 8.35 rounded to the tenths is 8.4. however if there is such a version of rounding, which could be possible and has been done by me by mistake in the past, I don't know of it.
It is 5.2 when rounded to the nearest tenths.
It is then 56.5 when rounded to the nearest tenth
It is 0.8 when rounded to the nearest tenth
10775.9
2.7
It is 5.2 when rounded to the nearest tenths.
65.6
It is then 52.8 when rounded to the nearest tenth
It is then 56.5 when rounded to the nearest tenth
It is 232.4 when rounded to the nearest tenth
It is then 20.2 when rounded to the nearest tenth
It is 0.8 when rounded to the nearest tenth
4.4
10775.9
2.7
54.4
28.6