Add or delete any zeros at the end of the decimal part, and the size of the decimal remains the same. For example: 0.4=0.400, 0.060=0.06.

Move the decimal point to the right (or left) by n bits respectively, and the value of the decimal point will be expanded (or reduced) by n times.

Decimal is a special expression of real numbers. All fractions can be expressed as decimals, and the points in decimals are called decimal points, which are the dividing lines between the integer part and the decimal part of a decimal.

Decimals with zero integer parts are called pure decimals, and decimals with non-zero integer parts are called decimals.

Extended data:

Classification of infinite decimals:

1, cyclic decimal

A number or numbers that start from somewhere in the decimal part and appear repeatedly in turn are called cyclic decimals. Cyclic decimals also belong to rational numbers and can be converted into component numbers.

2. Infinite acyclic decimal

There are infinite numbers in the decimal part. Decimals in which one number or several numbers do not appear repeatedly in turn are called infinite acyclic decimals, which are also irrational numbers and cannot be converted into numbers.