明确教材的地位作用各部分教材在整个教材中都有它一定的地位和作用,明确这一点,便为教材的处理和教学的安排提供了可靠的依据。“分数乘法”的地位作用有三点:1.巩固和加深已学的整数乘法,分数的意义和性质、分数的加减等知识;2.为学习分数除 The role of a clear textbook The various textbooks throughout the textbook has its own status and role, to make it clear that this will provide a reliable basis for teaching materials and teaching arrangements. The function of “fractional multiplication” has three points: 1. consolidate and deepen the integrant multiplication, the meaning and nature of the scores, the addition and subtraction of scores and other knowledge; 2. divide the learning scores by