Simple equation is the learning content of the fifth unit of fifth grade mathematics in People's Education Press. The main contents that students need to master are: using letters to represent numbers, solving simple equations and solving problems with column equations. Through the study of this unit, students can understand the method of expressing numbers by letters, understand the concept of equations, solve simple equations and solve some simple practical problems with equations.

Because the content of the equation is not only a simple understanding and learning in primary school, but also a key learning content in junior high school, students should seriously study the content of this unit from now on, not only to firmly grasp the content of this unit, but also to lay a solid foundation for learning the equation in the future.

Solve simple equations:

1. The meaning of the equation, the equation with unknown number is an equation, and there are two conditions: unknown number and equal sign.

2. All equations are equations, but equations are not necessarily equations.

3. The nature of the equation 1: both sides of the equation add and subtract the same number, and the left and right sides are still equal.

4. Nature of the equation 2: The two sides of the equation are multiplied by the same number, or divided by the same number that is not 0, and the left and right sides are still equal. The solution of the equation is the value of the unknown, and solving the equation refers to the process of solving the equation.

5. Test method: Make the left side of the equation = the right side of the equation.

6. Methods of solving equations: addition, subtraction and subtraction. Reduce use and increase consumption, and whoever decreases will increase. Multiplication and division, divided by numbers. Divide by whom and multiply by whom. These four formulas are aimed at the left side of the equation, so we should use these formulas flexibly to solve the equation. If the equation has brackets, you must first eliminate the numbers outside the brackets, and then eliminate the numbers inside the brackets.

7. Practical problems and equations: flexible use of six steps, the first step is to examine questions+solve problems, the second step is to find out relationships, the third step is to list equations according to relationships, the fourth step is to solve equations, the fifth step is to check whether the answers are correct, and the sixth step is to answer. In the six steps, examining the questions and finding the relationship are the most important, so we must carefully examine the questions and find the correct relationship. When finding two quantities, we should set the smaller quantity as X, and then get the other quantity represented by X through the quantitative relationship.

8. When encountering problems, we must use speed multiplied by time = total distance flexibly.