Five out of fifteen are multiplication formulas, which means 1 multiplied by 5 equals 5. This formula is widely used to teach basic multiplication in China's education system. The origin of this formula can be traced back to the ancient mathematics education in China.
The mathematical education system in ancient China was very developed, and students needed to master basic mathematical operation skills, including addition, subtraction, multiplication and division. In order to make it easier for students to remember and master multiplication, teachers have compiled the rules and results of multiplication into easy-to-remember formulas.
Five fifths is one of the formulas. This formula is simple and easy to remember, which can help students master the basic skills of multiplication quickly. With the passage of time, the formula "15 to 5" has gradually become a classic content in Chinese mathematics education, which has been widely used and spread to this day.
Besides fifteen, there are other multiplication formulas, such as 25 10, 35 15 and so on. These formulas are designed to help students master the rules and skills of multiplication, so as to complete the multiplication operation faster and more accurately.
Function of learning formula:
1, cultivate mathematical thinking: learning formula is not only a simple numerical operation, but also the embodiment of mathematical thinking. By learning formulas, students can gradually master the basic concepts, principles and problem-solving methods of mathematics, thus cultivating mathematical thinking and improving problem-solving ability.
2. Enhance calculation ability: Formulas are the basis of mathematical calculation. Learning formulas can help students master basic calculation methods and improve calculation speed and accuracy. This is very important for daily life and future study, because both work and study need to have certain computing ability.
3. Understanding mathematical concepts: Formulas are concrete expressions of mathematical concepts. By learning formulas, students can better understand mathematical concepts. For example, by learning the addition formula, students can understand the concept and operation rules of addition; By learning multiplication formula, students can understand the concept and operation rules of multiplication.
4. Promote the interest in mathematics learning: The process of learning formulas can be interesting. By solving various formula problems, students can experience the fun of mathematics in challenges and games, thus stimulating their interest in learning mathematics.
5. Cultivate the ability to solve problems: In the process of learning formulas, students need to use existing knowledge and experience to solve various problems. This can not only train students' computing ability, but also cultivate their ability to analyze and solve problems.