1, direct calculation method: the earliest multiplication calculation was completed by repeated addition. For example, 2×3 can be understood as the addition of two 3s, which is 6. This simple calculation method was widely used in primitive society.
2. Finger counting: In many cultures, people count with their fingers. They can easily count to 10, and then bend or bend their fingers to represent higher numbers. When they need to calculate multiplication, they can bend or bend their fingers repeatedly to represent the result of multiplication.
3. Calculation method: Calculation method is a calculation method used in ancient China. It uses a set of small sticks to represent numbers, and it represents multiplication by arranging the small sticks together. This method was very popular in ancient China, and was widely used in business and scientific calculation.
4. Indian law: Indian law is a calculation method based on Indian mathematical system. It uses a special number system called "Indian Numbers", which has a special symbol and symbol arrangement order. Using this numerical system and special symbol arrangement order, the Indian method can calculate the multiplication result quickly and accurately.
The function of multiplication is as follows:
1, simplify calculation: multiplication can simplify the process of adding multiple identical numbers into one step, thus speeding up the calculation and reducing the amount of calculation. For example, when calculating the total price of shopping or the sum of large-scale data, multiplication can greatly simplify the calculation process.
2. Expanding digital representation: Multiplication can expand the range of digital representation. By multiplying a number, we can get a number larger than the original number. This is especially important in the fields of engineering, science and business, because it enables us to deal with a wider range of values.
3. Accelerate mathematical operations: Multiplication plays an important role in mathematical operations. Many mathematical formulas and algorithms involve multiplication, such as multiplication distribution law, square difference formula and so on. By mastering multiplication skillfully, we can solve math problems faster.
4. Solving practical problems: Multiplication is widely used to solve practical problems. For example, multiplication plays a key role in calculating the growth rate, calculating the area and volume, and solving the problem of resource allocation.
5. Promote the development of mathematics: As one of the basic operations in mathematics, multiplication is an important cornerstone of the development of mathematics. Mathematicians have constantly discovered new mathematical theorems and laws through the research and exploration of multiplication, which has promoted the progress and development of mathematics.