It means repeat that decimal forever with it's last digit.
The line over a repeating decimal is called the vinculum.
A bar.
periodic line
I believe it means infinity.
If there is a line over a decimal, it means the decimal is repetitive. If you are typing it would look like this... .7
if used in a decimal it means that the number it is over is repeating ex) 27.33333333333333 instead you could write 27.3 with a line over the 3
It means that 6 is a recurring decimal such as 0.16666...recurring 6
Either, the decimal with a line over what's repeating (eg. 0.6 with a line over it), or decimal repeating (eg. "point six repeating").
it means repeat those decimals forever. example: __ 4.56 = 4.56565656565656565656565656........
A line over the decimal part of a number indicates that there is a part that recurs infinitely many times. Such numbers are rational.
The curved line over a short vowel is called a breve. It is used to indicate a short pronunciation of the vowel.
If the threes go on indefinitely, then it is a repeating decimal, represented by a line over the repeated number, also .333...(going on forever) is equivalent to 1/3