# Solve using mental math

When you try to Solve using mental math, there are often multiple ways to approach it. Math can be a challenging subject for many students.

## Solving using mental math

The best way to Solve using mental math is to eliminate as many options as possible. Scientific calculators with function and text storage function, calculators with other additional functions are not allowed to be used, and invigilators have the right to temporarily take away calculators that do not meet the requirements. Calculators should be prepared in advance. There is no backup calculator on site, and they cannot be borrowed from each other during the examination. First of all, for the intermediate accounting title examination, candidates can't bring calculators and other illegal electronic products into the examination room by themselves.

If the trial function satisfying certain boundary conditions is assumed in advance, and the approximate solution is carried out on this basis, the difficulty of solution will be reduced..

Long term existence does not mean rationality. These 12 words are the attitude of the central media towards building area. What will happen if building area is cancelled? After the cancellation, the developers' interests will be seriously damaged if the building area is cancelled. They can only raise the price to protect their interests.

Later, we had no contact. Although we suspended classes due to the impact of the epidemic, we did not suspend classes until our math teacher, Mr. Chen, made me really understand, understand and learn to use equations after giving a live lecture. It was he who told me about equations and their relations, how to list equations, and how to solve equations.

We can see that it is more difficult to solve third-order equations and fourth-order equations than solving quadratic equations, and we need to introduce complex numbers. However, we didn't learn complex numbers in junior high school, so we can't talk about them. We learned complex numbers in high school, but the solution of third-order equations and Fourth-order Equations does not introduce new knowledge. Universities are familiar with these, But solving equations is too thin to be a college course Therefore, although people spent a lot of time in history to get the root seeking formula for solving them, its final form is complex and the content involved is embarrassing, so it has been in the corner of mathematics teaching for many years This is also why it was mentioned at the beginning of this article that the solution of higher-order (here, it refers to more than two) equations in the exam must have rational roots that can be seen almost at a glance The solution of the cubic equation in history has enough plots to be written into novels, involving trust and betrayal Those who are interested in this can go directly to the major encyclopedias.

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