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乘法交換律和結合律介紹
乘法交換律和結合律介紹
更新时间:2026-09-06 00:16:05

  1、乘法交換律:在兩個數的乘法運算中,在從左往右計算的順序,兩個因數相乘,交換因數的位置,積不變。

  2、乘法結合律:三個數相乘,先把前兩個數相乘,再和另外一個數相乘,或先把後兩個數相乘,再和另外一個數相乘,積不變。

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