What does 2.6× 4 mean? What are the products of Chengde?

2.6× 4 means that the product of 2.6 times 4 is 10.4.

Interpretation of multiplication:

Multiplication is a shortcut to add the same numbers, and its operation result is called product.

Multiplication can also be seen as calculating the objects arranged in a rectangle (integer) or finding the area of a rectangle with a given side length. The area of the rectangle does not depend on which side is measured first, which shows the exchange property. The product of two measured values is a new type of measurement, for example, multiplying the length of two sides of a rectangle to get its area, which is the theme of size analysis.

The multiplication of integers (including negative numbers), rational numbers (fractions) and real numbers is a systematic summary of this basic definition. Multiplication can also be seen as calculating the objects arranged in a rectangle (integer) or finding the area of a rectangle with a given side length.

Some applications of multiplication:

1. Calculating area and volume: In geometry, calculating area and volume requires multiplication. For example, the area of a rectangle is equal to the product of length and width, and the volume of a cube is equal to the product of length, width and height.

2. Calculating taxes and profits: In economics, calculating taxes and profits also requires multiplication. For example, tax is equal to the product of tax rate and sales volume, and profit is equal to the product of selling price and sales volume MINUS cost.

3. Calculating the population growth rate: In statistics, multiplication is also needed to calculate the population growth rate. For example, the population growth rate is equal to the birth rate minus the death rate plus the immigration rate. These ratios are expressed in percentages and need to be calculated by multiplication.

The origin of multiplication formula table

The multiplication table is a convenient and quick mathematical tool and the crystallization of ancient mathematics education. Ancient mathematics education paid attention to practicality and intellectual development, and multiplication table was an important content.

As the crystallization of ancient mathematics education, the multiplication table has been constantly improved in the process of evolution and has been widely used in mathematics education all over the world. Mathematicians' research on multiplication formula makes it more systematic and theoretical, and also promotes the development of mathematics education. With the help of abacus and other calculation tools, multiplication formula makes calculation faster and simpler.

The portability of multiplication table also makes it widely used in real life. This practical, portable and efficient mathematical tool has made important contributions to the development of human society.