1, multiplication table

The multiplication table is one of the most familiar calculation tools for students. By memorizing the multiplication formula table, you can quickly complete the multiplication operation in primary school.

2. Vertical calculation

Vertical calculation is one of the necessary calculation methods in primary and secondary schools. Through vertical calculation, operations such as addition, subtraction, multiplication and division can be completed quickly and accurately.

3. Decomposition factor

Factorization is a common method in multiplication of large numbers. Multiplying a large number into several smaller numbers can simplify the operation process.

Calculation is the foundation of mathematics, and accurate and fast calculation is a kind of ability, which can improve analytical ability and reasoning ability and promote the development of thinking. The key to fast calculation and clever calculation is to carefully examine the questions, master the nature of calculation skillfully and use it flexibly, including direct application, reverse application, popularization application, variant application and comprehensive application. Mastering these, we can simplify the complicated calculation, turn the difficult into the easy, and achieve the goal of accuracy, rapidity and correctness.

The role of mathematics:

Mathematics is a subject that studies concepts such as quantity, structure, change, space and information. It also plays an irreplaceable role in the development of human history and social life, and is an indispensable basic tool for studying and studying modern science and technology.

Mathematics is an ancient and often new subject, which studies the concepts of quantity, structure, change and spatial model produced by counting, calculating, measuring and observing the shape and movement of objects. The occurrence and development of mathematics has gone through a long historical stage, which is characterized by accuracy, abstraction, rigor and extensiveness, among which abstraction is the inherent feature of mathematics, which leads to its profundity and wisdom.

Mathematics has more than one hundred branches, and its application has penetrated into all fields of natural science, technical science, social humanities and all aspects of social life. The knowledge and application of basic mathematics is an indispensable part of individual and group life.

Mathematics is applied in many different fields, including science, engineering, medicine and economics. The application of mathematics in these fields is generally called applied mathematics, which sometimes arouses new mathematical discoveries and promotes the development of new mathematical disciplines.