1.0
.10
an integer plus and integer will always be an integer. We say integers are closed under addition.
If the integer subtracted is smaller than or equal to the first integer, then the answer is positive. Otherwise, if the integer subtracted is larger, then the answer is negative.
It is not an integer, nor can it ever be an integer. It can, however, be rounded to the nearest integer, in which case 0.1 will round to 0 to the nearest integer.
000-099 = -99
.099 ton
4121
79.642
1.0
0.99 = 99/100
3
It is impossible to say without knowing what country you're asking about. There are several countries with a domestic telephone area code 099 or similar.
OV-099
.10
a man named stupid
408