1. Save time: Math exams are usually short, with a large number of questions and great difficulty. If the examinee can master the quick calculation skills skillfully, it can greatly save the problem-solving time and improve the efficiency of answering questions.

2. Improve the accuracy: Fast calculation skills can help candidates calculate the results quickly and accurately, and avoid losing points because of calculation errors. Especially in some topics that need accurate calculation, such as addition, subtraction, multiplication and division of fractions and decimals, the application of fast calculation skills can greatly improve the accuracy of answers.

3. Enhance self-confidence: For some complicated calculation questions, if candidates can get correct answers quickly, it will greatly enhance their self-confidence and help them maintain a good attitude in the subsequent exams.

4. Cultivate logical thinking ability: The application of quick calculation skills often requires candidates to make logical reasoning and thinking, which is very helpful to cultivate their logical thinking ability.

5. Dealing with complex problems: In real life, we often encounter some complex mathematical problems, such as the calculation of loan interest and the calculation of investment return. Solving these problems often requires the use of quick calculation skills. Therefore, it is of great practical significance for candidates to master quick calculation skills.

Generally speaking, the importance of quick calculation in mathematics examination is self-evident. It can not only improve the efficiency and accuracy of answering questions, but also cultivate their logical thinking ability and ability to deal with complex problems. Therefore, candidates should pay attention to the study and application of quick calculation skills.