1. A number is 5 parts per million, 5 parts per million, the highest digit is 5, and all other numbers are 0. This number is written like this.

550005000

The mantissa after omitting ten thousand digits is

5500 1 10,000

.

The decimal unit of 2.0.375 is

0.00 1

Yes

375

One such unit.

Display parsing

3.6.596596 ... Yes

pure

Circulate decimals and record them in a simple way.

6.

five

nine

six

Keep two decimal places.

6.60

.

Display parsing

4.

1

six