乘法分配律是一条应用比较广泛,有助于后继知识学习的运算定律。要使学生透彻理解和熟练掌握乘法分配律,教学时,需根据学生的认知特征和思维发展水平,引导学生主动参与探索、发现、理解和运用规律的过程,同时注意培养学生的逻辑思维能力。 Multiplicative distribution law is a more generalized algorithm that can be used in subsequent knowledge learning. To enable students to thoroughly understand and master the law of multiplication distribution, teaching, students need to be based on cognitive characteristics and thinking level of development, and guide students to take the initiative to participate in the exploration, discovery, understanding and use of the law process, while developing students' logical thinking ability .