Let's share several multiple-choice answering skills, but the answering skills are only auxiliary answers. You can try when conventional thinking can't solve the problem. The real answer is to use what you have learned.

1. Special value method

By taking special values to improve the speed of solving problems, the general situation in the problem must meet our special situation of taking values, so we choose appropriate special values according to the meaning of the problem to help us eliminate wrong answers and choose correct options.

2. Estimation method

When there is a big gap between the options and there is no suitable method to solve the problem, we can estimate the approximate range or approximate value of the answer by appropriately enlarging or narrowing some data, and then choose the option closest to the estimated value.

Note: When comparing dimensions or finding approximate values with root numbers, square them to reduce errors.

3. Inverse method

Giving full play to the role of options, observing the characteristics of options and formulating special solutions to problems can greatly simplify the steps of solving problems and save time. When doing multiple-choice questions, you must remember not to ignore the options.

4. Special case analysis method

When there is no limited situation in the question, we can consider the question from the most special situation, which can often help to exclude some options, and then analyze [excessive] (bigger and smaller) from the special situation to the general situation to choose the correct answer.

These answering skills can be used according to the specific situation in the future, I hope to help you!