题目内容
(5分)计算:
.
解:原式=1-2+3··································································································· 3分
=-1+3 5分
解析:略
练习册系列答案
相关题目
题目内容
(5分)计算:
.
解:原式=1-2+3··································································································· 3分
=-1+3 5分
解析:略