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Fifth grade math tools
All the operations in grade five revolve around the calculation of addition, subtraction, multiplication and division, including the rounding principle, multiplication and division and approximation of decimal multiplication.

Mind mapping:

Mind mapping, also known as mind mapping, is an effective graphic thinking tool to express divergent thinking. It is simple but effective, and it is a revolutionary thinking tool. Mind mapping uses the skills of paying equal attention to graphics and texts, showing the relationship between topics at all levels with hierarchical diagrams of mutual subordination and correlation, and establishing memory links between topic keywords, images and colors. Mind mapping makes full use of the functions of the left and right brain and the laws of memory, reading and thinking to help people develop in a balanced way between science and art, logic and imagination, thus opening up the infinite potential of the human brain. Therefore, mind mapping has a powerful function of human thinking.

Mind mapping is a visual way of thinking. We know that radioactive thinking is the natural way of thinking of the human brain. Every kind of information that enters the brain, whether it is feelings, memories or ideas-including words, numbers, symbols, aroma, food, lines, colors, images, rhythms, notes and so on. -It can become a thinking center, from which thousands of joint points radiate outward, each joint point represents a link with the central theme, and each joint point represents a link with the central theme. Then thousands of joints spread out, showing a radioactive three-dimensional structure. The connection of these joints can be regarded as your memory, just like neurons in the brain, and it is your personal database.

Application field:

Mind mapping is an effective way of thinking. The application of mind mapping in memory, learning and thinking is beneficial to the spread of thinking in human brain. Mind mapping has been widely used around the world. Singapore's Ministry of Education has listed mind mapping as a compulsory subject in primary schools, and a large number of top 500 enterprises are also learning mind mapping. China has been using mind mapping for more than 20 years.

Since 1980s, mind mapping has been introduced into Chinese mainland. Initially, it was used to help "students with learning difficulties" overcome learning obstacles, and later it was mainly used by the industrial and commercial circles (especially in the field of enterprise training) to improve the learning efficiency and innovative thinking ability of individuals and organizations. In subject teaching, after 52 years of development, it has not been widely used in schools After 15 years of research and practice, the thinking visualization research team led by Liu Zhuoyuan of East China Normal University came to the conclusion that "mind map" is not suitable for direct application in subject teaching. For students with poor abstract thinking ability, "image memory" can really help students improve the efficiency of "memorizing knowledge", but it can't deepen students' understanding of knowledge, which belongs to a shallow learning; In addition, "free divergent association" has the characteristics of unconstrained style and uncontrolled thinking, which is more suitable for "mind".