按换位法规则的要求得出结论的方法是在教学过程中广为应用的一种逻辑方法,不掌握这种方法,学生就不可能有完全合乎要求的思维。象前述几种方法一样,在小学教学中,这种方法通常也没有作为学生专门掌握的对象。因此,绝非所有的学生(甚至高年级学生)都懂得,同一个结论可能与几种不同的根据有关,因此不能光凭结论的存在与否来肯定根据的存在与否。例如,学生正确地指出,如果角是邻角,则其角之和为180°。但不能象很多 According to the transposition law requirements of the method of conclusion is widely used in teaching a logical method, do not master this method, students can not have fully qualified thinking. Like the several approaches described above, this approach is often not the subject of special education in primary schools. Therefore, not all students (even upperclassmen) understand that the same conclusion may be related to several different grounds, and therefore the existence of the ground can not be affirmed simply by the existence of the conclusion. For example, the student correctly states that if the corners are adjacent corners, then the sum of their corners is 180 °. But not like a lot