78.765 rounded to the nearest tenth is 78.8. The digit to the right of the tenth is the hundredth. When rounding anything less than five you round down. When rounding anything five or more you round up. The hundredth digit is 6, which is more than 5, so you round up, making the answer 78.8.
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
28.6
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
965.4
2.1