乘法概念,是数学运算的一个重要概念。它是两个数之间建立相乘关系的依据。乘法概念得出的数学表达式,是这个抽象概念的具体约定形式,它使得用计算即用一种几乎是机械的动作来代替一部分推理,把两数相乘的思维在能看得见的形式上再现出来。乘法概念的形成经历过一个从低级到高级、由狭义到广义的过程。和它的形成过程大体相似,学生学习乘法概念的过程则是由浅入深、循序渐进的。了解乘法概念的发展,正确掌握它的表达式,有利于在各个不同教学阶段讲授这部分知识时,避免把它分割为毫不相干的几小块,而始终正确地把握住乘法概念的内涵,螺旋式地讲清它的意义及其相应的表达式。在小学,乘法概念的学习分为两个阶段,有过几次变化和发展。第一个阶段是在中低段,数的范围局限在非负整数集。第二个阶段是在高年级,数的范围 The concept of multiplication is an important concept of mathematical operations. It is the basis for establishing a multiplication relationship between two numbers. The mathematical expression derived from the concept of multiplication is a concrete convention of this abstract notion, which makes it possible to replace a part of the reasoning with an almost mechanical act of calculation, to multiply the two numbers in a visible form Reappeared. The formation of the concept of multiplication has gone through a process from low to high, from narrow to broad. And its formation process is generally similar to students learn the concept of multiplication process is from shallow to deep, step by step. Understanding the development of the concept of multiplication and correctly grasping its expressions help to teach this part of knowledge in different stages of teaching to avoid dividing it into irrelevant pieces and always correctly grasp the connotation of the concept of multiplication, Spiral to clarify its meaning and its corresponding expression. In primary school, the concept of multiplication is divided into two phases, with several changes and developments. The first stage is in the lower and middle sections, and the range of numbers is limited to nonnegative integer sets. The second stage is in the upper grades, the range of numbers