6.5 is the answer.
Round 6.385 to the nearest half would be 6.5. When rounding to the nearest half, you look at the digit immediately to the right of the decimal point. If it is 5 or greater, you round up to the next half; if it is less than 5, you round down. In this case, since the digit after the decimal point is 3, which is less than 5, we round down to 6.5.
4.5 already is rounded to the nearest half.
To the nearest half, one half
1,500,000 is already rounded to the nearest half-million.
4/5 to the nearest half is 1.
53
6.5
It is 2.5
5.5
38.412 rounded to the nearest half is 38.5
12.5
1/2
It is 8.9