初一年级数学幂的运算综合应用(第二课时)主讲人朱宇辰北京市第五中学通州校区同底数幂乘法幂的乘方积的乘方知识梳理()mnmnaaamn,都是正整数()()mnmnaamn,都是正整数()()nnnababn是正整数同底数幂乘法的逆运算幂的乘方的逆运算积的乘方的逆运算知识梳理()mnmnaaamn,都是正整数()()mnmnaamn,都是正整数()()nnnababn是正整数用简便方法计算:典型例题202020201()88202020201()88积的乘方的逆运算()()nnnababn是正整数用简便方法计算:典型例题202020201()8820201=(8)8:解原式用简便方法计算:典型例题202020201()882020(1)用简便方法计算:20201=(8)8:解原式典型例题202020201()882020(1)1用简便方法计算:20201=(8)8:解原式典型例题巩固练习201920204(0.25)用简便方法计算:巩固练习201920204(0.25)201920191=4(0.25):解原式用简便方法计算:巩固练习201920204(0.25)同底数幂乘法的逆运算()mnmnaaamn,都是正整数用简便方法计算:201920191=4(0.25):解原式巩固练习201920204(0.25)201920194(0.25)(0.25)用简便方法计算:201920191=4(0.25):解原式巩固练习201920204(0.25)201920194(0.25)(0.25)积的乘方的逆运算()()nnnababn是正整数用简便方法计算:201920191=4(0.25):解原式巩固练习201920204(0.25)201920194(0.25)(0.25)20194(0.25)(0.25)2019(1)(0.25)0.25用简便方法计算:201920191=4(0.25):解原式巩固练习201920204(0.25)用简便方法计算:20192020=40.25:解原式201920191=40.252019201940.250.252019(40.25)0.250.25巩固练习5100.252用简便方法计算:巩固练习5100.252555=0.252:解原式用简便方法计算:巩固练习5100.252同底数幂乘法的逆运算()mnmnaaamn,都是正整数用简便方法计算:555=0.252:解原式巩固练习5100.252555=0.2522积的乘方的逆运算()()nnnnabcabcn是正整数用简便方法计算:555=0.252:解原式巩固练习5100.252555=0.25225=(0.2522)1用简便方法计算:555=0.252:解原式51巩固练习5100.252555=0.25225=(0.2522)525=0.252:解原式方法一方法二用简便方法计算:555=0.252:解原式151巩固练习5100.252555=0.25225=(0.2522)...