What is the definition of decimals?

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.

Decimal attribute

Add or delete any zeros at the end of the decimal, 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.

Conversion of Decimals and Fractions in Extended Data

1, limited score: reduced to a few tenths (a few percent ...).

2. Decimal fraction of pure cycle: the cycle segment is a numerator, and if there is a cycle segment, the denominator is 9; The loop segment has two digits, and the denominator is 99; The loop has three digits, the denominator is 999, and so on. For example,,, can be tender.

3. Mixed cyclic decimal: reduced to the sum of finite decimal and pure cyclic decimal, such as?

4. Infinitely circulating decimals are irrational numbers and cannot be converted into fractions.

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