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十八、分数乘法的意义是什么?它在小学数学教材中有什么作用?分数乘法的意义,分为分数乘以整数和一个数乘以分数两种情况。分数乘以整数的意义与整数乘法的意义相同,就是求几个相同加数的和的简便运算。一个数乘以分数的意义,就是求这个数的几分之几是多少,这是乘法意义的一次扩展。
18 What is the significance of fractional multiplication? What is the role of fractional multiplication in elementary mathematics textbooks? The significance of fractional multiplication is divided into fractions multiplied by integers and fractions multiplied by fractions. The meaning of fractions multiplied by integers is the same as the meaning of multiplication by integers, and is the simple operation of finding the sum of several addends. The meaning of multiplying a number by a fraction is to find out what fraction of this number is, which is an extension of the meaning of multiplication.