Whole fraction of the knowledge points, percentage of the knowledge points

Integer: Natural numbers are all integers.

Natural Number: A number used to represent the number of objects. Note: But integers are not necessarily natural, and natural numbers are only one of the integers.

Decimal side: Divide the integer "1" into 10, 100, 1000, and 1000 parts.

One percent.

1. One thousandth can be expressed as a decimal. (e.g.)8 are all decimal Yun Shi block).

Fraction: The division of an object or unit of measurement into equal parts, which can be expressed as fractions. (Significance).

Fraction: The unit "1" is divided into several parts equally, indicating the number of one or several parts obtained in this way, which is called a fraction.

Percentage: A number that indicates that one number is a percentage of another number, called a percentage. Percentages are also called percentages or percentages. Percentages are usually expressed as "%".

The nature of decimals: add "0" to the end of the decimal or remove "0", and the size of the decimal does not change.

The basic property of fractions: the numerator and denominator of fractions are multiplied or divided by the same number at the same time (except 0), and the size of the fraction remains unchanged.

Note: The basic properties of decimals are consistent with the basic properties of fractions).

The percentage knowledge points are as follows:

First, the concept of percentages.

Percentages, also known as percentages or percentages, are a method of expressing the value of proportions, ratios, or fractions. Percentages are usually not written as fractions, and cannot be followed by units, but are represented by a percent sign "%" after the original numerator.

2. Reading. Percentages should be read first with percent signs, read as percent, and then read numbers, and the number reading method is the same as integer reading, such as: 80% is read as 80%.

There are also decimal types and fraction types, and decimal and fractions are only read in the original way, but they must be read "percent" first.

3. The difference between percentages and fractions.

1. Percentages (also known as percentages or percentages) have a very different meaning from fractions. Percentages are "a number that indicates that one number is a hundredth of another number." "It can only represent a multiple relationship between two numbers, not a specific quantity.

For example, it can be said that 1 meter is 20% of 5 meters, but it cannot be said that "a length of rope is 20% meters." ”

2. The application range is different. Percentages are more useful in production, work and life, and are often used in surveys, statistics, analysis and comparison. Fractions are often used in measurements and calculations when no integer results are available.

3. A percentage reflects the percentage of a number that accounts for another number, while a fraction reflects a fraction of a number that accounts for another number.

4. The denominator of the percentage is 100, and the numerator or denominator of the fraction can be all natural numbers that are not 0.