“乘除法各部分间的关系”单元中的例 7、例 8，是用列含未知数 X的等式的方法解乘除法应用题的内容。在例 7、例 8之前编排的例 1至例 6，其特点与“加减法各部分间的关系”单元中的例 1至例 6相同。根据这一编排特点，提出以下教学建议。 　　一、帮助学生深刻理解加减乘除法 Example 7 and Example 8 in the “Relationships Between Parts of a Multiplication and Division” section explain the content of the multiplication problem using the method of columns containing the unknown X. Examples 1 to 6, arranged before Example 7 and Example 8, have the same features as Examples 1 to 6 in the “Relationship Between Addition and Subtraction Parts” sections. According to the characteristics of this arrangement, put forward the following teaching suggestions. First, to help students a profound understanding of the addition, subtraction and multiplication division