向量的加法教案（The addition of vectors）.doc

向量的加法教案（The addition of vectors） The addition of vectors Wu zhong senior middle school ma xiangrong [educational purpose] 1. Through the exploration of vector addition, the concept of vector addition is mastered and the meaning of vector addition is understood in combination with physics. We can master vector addition, parallelogram law and triangular method projection, and we can make the sum vector of two vectors. In the application activity, understanding vector addition satisfies the geometric meaning of the commutative law and the associative law and the two operational laws. The sum of two vectors that have a special position relationship, such as its linear vector, a total starting vector, a common endpoint vector, and so on. Through the study of this section, we can cultivate students ability of analogy, migration, classification and induction. The operation of vector addition and its geometric meaning The understanding of the triangle law of vector addition and the sum of the two collinear vectors. [teaching methods] analogy, inquiry, practice and multimedia application. Class time [teaching process] Review of the past: 1. What is a vector? How do I represent vectors? The amount of magnitude and direction is called a vector. Vectors can be represented by a line segment. What is the equal vector? The same direction, the two vectors that are the same length are called equal vectors. What is a parallel vector? Two non-zero vectors that have the same direction or opposite, are called parallel vectors, and parallel vectors are called collinear vectors, right? Introduce new lessons: With the knowledge that we have just reviewed, we can further explore the operation of vectors. In the computation of Numbers, the addition operation is the most basic operation, which is similar to the operation of vectors, and we also begin to explore the subject of addition from addition: vector addition. Definition: the sum of two vectors and the sum of the vectors. How exactly d