Addition is one of the most basic operations in mathematics, which refers to the process of combining two or more numbers to get a sum. In the first grade math class, the students learned simple addition. The relevant knowledge is as follows:

1, the basic concept of addition is that there are two or more numbers, and we add them to get a new number, which is their sum. Expressed by mathematical symbols: a+b=c, where A and B represent two addends respectively, and C represents their sum.

For example, we have two apples and put three apples on the table. How many apples are there on the table now? We can use the hand index to find that one * * has five apples. This is an example of a simple addition operation.

3. When adding, you need to follow a certain order. Usually we start with single digits and work our way up. For example, when calculating 23+ 15, we first calculate the unit number 3+5=8, then add the decimal number 2 to the carry 1 to get 10, and finally add the hundred digits 2 to the carry 1 to get 3. Therefore, 23+ 15=38.

Function of formula

1. formula can be used to express mathematical relations and laws. For example, the root formula of quadratic equation shows the relationship between the solution of quadratic equation and the coefficient, so that we can get the answer through simple calculation. In addition, the formula can also be used to derive various mathematical theorems and properties, such as Pythagorean theorem and trigonometric function.

2. Formulas can be used to solve practical problems. In physics, engineering, economics and other disciplines, formulas are widely used to solve various problems. For example, Newton's second law F=ma can be used to solve mechanical problems, such as calculating the relationship between acceleration and force of an object.

3. Formulas can also help us with data processing and analysis. In statistics, formulas are used to calculate and analyze various statistical data, such as mean, standard deviation and regression analysis. The calculation of these statistics needs to use various formulas to calculate and analyze.

4. Formulas can also help us to reason and prove. In mathematics and logic, formulas are used to express various propositions and reasoning relationships, such as hypothetical propositions, full-name propositions and existential propositions in logical reasoning. By using formulas, we can express and prove our views and conclusions more clearly.