8.5乘0.79减0.35乘7.9简便运算
问题描述：
8.5乘0.79减0.35乘7.9
简便运算
答
8.5*0.79-0.35*7.9＝0.85*7.9-0.35*7.9＝（0.85-0.35）*7.9＝0.5*7.9＝3.95
8.5乘0.79减0.35乘7.9
简便运算
8.5*0.79-0.35*7.9＝0.85*7.9-0.35*7.9＝（0.85-0.35）*7.9＝0.5*7.9＝3.95