8         5 52 2C)         D)

12, - File thứ 1: de-kiem-tra-giua-ki-toan-7-de-chinh-thuc-1_18112020
File thứ 1: de-kiem-tra-giua-ki-toan-7-de-chinh-thuc-1_18112020
12,5 : 1,5 :2 3. 1 2 : .8         5 52 2

c)  

      

d)