Applicare la formula: $ab$$=ab$, dove $ab=0.8\cdot 3\cdot \left(\frac{1}{3}\right)$, $a=\frac{4}{5}$ e $b=3$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=1$, $b=3$, $c=\frac{12}{5}$, $a/b=\frac{1}{3}$ e $ca/b=2.4\cdot \left(\frac{1}{3}\right)$

Applicare la formula: $ab$$=ab$, dove $ab=2.4\cdot 1$, $a=\frac{12}{5}$ e $b=1$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=\frac{12}{5}$, $b=3$ e $a/b=\frac{2.4}{3}$