怎样简便计算0.6666*0.8 0.1111*5.2

题目

怎样简便计算0.6666*0.8 0.1111*5.2

答案

0.6666*0.8=0.1111*6*0.8=1111*48/100000=53328/100000=0.533328
0.1111*5.2=1111*52/100000=57772/100000=0.57772