Applicare la formula: $a+b$$=a+b$, dove $a=\frac{13}{5}$, $b=-5$ e $a+b=2.6-5$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=135$, $b=2$, $c=-\frac{12}{5}$, $a/b=\frac{135}{2}$ e $ca/b=-2.4\left(\frac{135}{2}\right)$

Applicare la formula: $ab$$=ab$, dove $ab=-2.4\cdot 135$, $a=-\frac{12}{5}$ e $b=135$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=-324$, $b=2$ e $a/b=-\frac{324}{2}$