Name score

First, fill in the blanks. (1 minute per grid, ***20 points)

L, a number with hundreds of millions of digits is 5, 10000, the highest digit of each digit is also 5, and the rest digits are 0. This number is written as (), and the mantissa after omitting ten thousand digits is ().

The decimal unit of 2.0.375 is (), and it has () such units.

3, 6.596596 ... is a cyclic decimal (), which is simply called (), and two decimal places are reserved.

4. You can fill in,