1, plan
For the problem that the conditions in the topic are abstract and it is not easy to write the answer directly according to the knowledge learned, you can draw a plan to help yourself think and solve the problem.
For example, there are two natural numbers A and B. If A increases 12 and B remains unchanged, the product increases by 72. If a remains unchanged, b increases 12, and the product increases 12O, so as to find the product of the original two numbers.
According to the abstract characteristics of topic conditions, we might as well borrow a rectangular diagram to transform conditions into the relationship between elements and products. Draw a rectangle first, where the length means A and the width means B. The area of this rectangle is the product of the original two numbers.
2. Polygons
Some quadrature problems, combined with the content of the topic, draw a three-dimensional diagram, which makes the content of the topic intuitive and vivid, and is conducive to thinking and solving problems. For example, cutting a cube into two cuboids will increase the surface area by 8 square meters. What is the surface area of the original cube?
If you only rely on imagination, it will be even harder to do it. Drawing pictures according to the meaning of the problem can help us think and find out the solution to the problem. Draw a three-dimensional picture according to the meaning of the question.
3. Analysis chart
For some application problems, in order to correctly examine the problems and analyze the quantitative relationship in the problems, the analysis diagram can be used to express the relationship between conditions and problems in the problems. For example, Xinhua Middle School bought 8 tables and chairs and spent 8 17.6 yuan. The price of each table is 78.5 yuan, which is 62.7 yuan more expensive than each chair. How many chairs did you buy?
Drawing skills of solving problems in the second grade of primary school
1, a well-educated sophomore, is in the transition stage from image thinking to abstract thinking. Many mathematical problems are presented in the form of words, and the language expression is so simple and boring that it is often impossible to understand the meaning of the questions.
2. Make use of the characteristics that primary school students like to draw and are good at drawing, and let them draw in their favorite way. The original ecological graphics are vivid and interesting, which reproduces the relationship between numbers and integrates mathematics and graphics.
3. Drawing can promote thinking, and ultimately simplify the complex, turn the abstract into intuition, and find the answer to the question better, thus improving students' ability to solve problems. Therefore, we should be good at creating experience situations in the teaching of "Re-study of Skin", so that students can have the need to draw in the process of thinking and establish the concept of drawing without understanding.