7.9
The tenth is the first digit after the decimal point, so use the second after the decimal point (the hundredth) to decided whether to round it up or down:
7.9372539 to the nearest tenth is 7.9 since 3 is less than 5.
It is 232.4 when rounded to the nearest tenth
It is 12.4 rounded to the nearest tenth
It is then 20.2 when rounded to the nearest tenth
33.8
6.1
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 12.4 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
4.4
346.21 rounded to the nearest tenth is 346.2.
113.04 rounded to the nearest tenth is 113.0.
0.6