Lead the students to conclude the above concept and laws.

引导学生概括出乘法的意义和乘法交换律、结合律.

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This is the Associative Property of Multiplication. Read after me, please.

师:这就是乘法结合律, 请跟着老师读.

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Grasp Property and the Associative Property of Addition.

掌握加法交换律和加法结合律,培养学生初步的归纳推理能力.

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Table 2.1 at the end of this chapter summarizes precedence and associativity for all operators.

本章末尾的表2-1完整总结了所有运算符的优先级和结合律.

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Further on, we can specify an algebra that consists of axioms for commutativity, distributivity, associativity, etc.

进一步的, 我们可以定义包含交换律 、 分配律 、 结合律等公理的代数.

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