3.1 or 3.10 if you want two decimal places.
312 rounded to the nearest 100 (hundreds place) is 300.
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
0.6
312 rounded to the nearest 100 (hundreds place) is 300.
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 0.8 when rounded to the nearest tenth
It is then 20.2 when rounded to the nearest tenth
It is 232.4 when rounded to the nearest tenth
It is 12.4 rounded to the nearest tenth
4.4
113.04 rounded to the nearest tenth is 113.0.
346.21 rounded to the nearest tenth is 346.2.