数学内容与教材简析 乘法分配律(教材第68-69页例5)第1课时,新授课。 乘法分配律是小学数学中最重要的基础知识之一。在《乘法的意义和运算定律》章节,乘法分配律既是重点,又是难点。它不同于对乘法交换律和结合律的敦学,因为学生在学习这些定律之前已通过大量的 Mathematical Content and Textbook Analysis Multiplication Distribution Law (Textbooks, pp. 68-69, Example 5) Lesson 1, new lectures. Multiplication assignment law is one of the most important basic knowledge in elementary mathematics. In the chapter “Meaning of multiplication and the law of operations,” the law of multiplication assignment is both an important and a difficult one. It differs from the study of multiplicative commutativity and conjugation law, because students have passed a large number of