1, definition and properties of multiplication formula: multiplication formula is a method to help memory and fast calculation, and it is the result of multiplication of two numbers. For example, 3824 is a multiplication formula, which means that 3 times 8 equals 24. According to the nature of multiplication, the multiplication of any two numbers is equal to the multiple of the result of adding these two numbers respectively. For example, multiplying 3 by 8 can be regarded as the addition of 8 3s, and the result is 24.
2. Form of multiplication formula: there are two forms of multiplication formula, one is that the multiplicand is in the front and the multiplier is in the back, such as "3× 8"; The other is that the multiplier comes first and the multiplicand comes last, such as "8×3". These two forms actually represent the same multiplication operation.
3. Application of multiplication formula: In actual calculation, we can choose different multiplication formulas for calculation as needed. For example, when we need to calculate 3 times 8, we can choose the formula "3824" or "8×3". Both methods can get correct results.
4. Improve the calculation efficiency: Mastering the multiplication formula can help us to carry out the multiplication calculation faster. When we master each multiplication formula and its corresponding formula skillfully, we can quickly find a suitable formula to calculate, thus improving the calculation efficiency.
5. Cultivate mathematical thinking: Learning multiplication formula can not only help us improve our computing ability, but also cultivate our mathematical thinking. By learning and memorizing multiplication formula, we can better understand the principle of multiplication operation, thus deepening our understanding of mathematical knowledge.
History of multiplication formula
1, Origin and Early Development: The origin of multiplication formula can be traced back to the Spring and Autumn Period and the Warring States Period, when there was a multiplication table of 99 and a record of 7749. In Guanzi, Xunzi, Huainanzi and other books, there are records about the multiplication table of 99. These early records are the embryonic form of the development of multiplication formula, which laid the foundation for its later perfection and development.
2. Perfection of the 99 multiplication table: In the Northern and Southern Dynasties, the mathematician Jia Sixie expounded and explained the 99 multiplication table in Qi Yao Min Shu. Since then, the 99 multiplication table has gradually been widely used in mathematics education and daily life.
3. Formula and popularization: With the passage of time, the multiplication formula has gradually become a formula and is widely used in children's mathematics enlightenment education. In the Ming and Qing Dynasties, multiplication formula has become one of the necessary knowledge for children's enlightenment, which has played an important role in promoting the development of children's mathematical thinking.
4. Form diversification and modernization: Historically, the forms of multiplication formulas are diversified, including not only Chinese formulas, but also numerical formulas and letter formulas. At the same time, with the development of mathematics education, the form of multiplication formula is constantly modernized, and various forms of formula tables such as numbers, letters and graphics have appeared.
5. Cultural value and inheritance: As a part of China traditional culture, multiplication formula has rich cultural value. It is not only an important achievement in the development of ancient mathematics in China, but also one of the important contents of mathematics enlightenment education. At the same time, the multiplication formula is also one of the important carriers of China's cultural heritage, representing the wisdom and spirit of the people of China.