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乘法交换律和结合律介绍
更新时间: 2021-06-11 21:47:54  

1、乘法交换律:在两个数的乘法运算中,在从左往右计算的顺序,两个因数相乘,交换因数的位置,积不变。

2、乘法结合律:三个数相乘,先把前两个数相乘,再和另外一个数相乘,或先把后两个数相乘,再和另外一个数相乘,积不变。

关键词: 乘法 交换 结合 介绍

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