The positional relationship is relative and is determined by the reference object or observation point. When determining the left and right, the observer's left and right are generally taken as the standard, but it is still necessary to classify and discuss according to the attributes of the observed object.
The object of observation is inanimate objects. When the observed object is an inanimate object, such as various figures, the standard for judging left and right is generally the observer. There is a circle on the left and a five-pointed star on the right of the square.
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The relationship between two people is relative. When describing the relationship between left and right, a person must be regarded as an observer, which requires children to put themselves in their shoes. Empathy is the difficulty of cognition. For example, facing the mirror, the person in the mirror is opposite to us, and his left and right are also relative. I am teacher Wang, focusing on primary school mathematics!
There is a section in the interesting math column of the teacher's first grade that introduces the cognitive process in detail. I have also communicated with fans' parents, introducing cognition in many directions in combination with life scenes, and encouraging children to describe their positional relationship, such as up and down, left and right.
A. What is the major category of communication engineering?
Communication engineering aims to accomplish the first thing mentio