Описание слайда:
(15х1,6х19,22):(32,56х12,4)
Lg(15х1,6х19,22):(32,56х12,4)=Lg(15х1,6х19,22)-Lg(32,56х12,4)
Lg15=1,1760
Lg1,6=0,2041
Lg19,22=2*1,2833=2,5666
Lg 32,56=1,5126
Lg12,4=1,0934
(1,1760+0,2041+2,5666)-(1,5126+1,0934)=1,3407
Ant lg 1,3407 =21,9129
Проверка:
15*1,6*19,22=8847,36
32,56*12,4=403,744
8847,36/403,744=21,9132