Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=1$, $b=3$, $c=2$, $a/b=\frac{1}{3}$ e $ca/b=2\cdot \left(\frac{1}{3}\right)$

Applicare la formula: $ab$$=ab$, dove $ab=2\cdot 1$, $a=2$ e $b=1$

Applicare la formula: $\frac{a}{b}+\frac{c}{b}$$=\frac{a+c}{b}$, dove $a=2$, $b=3$ e $c=-2$

Applicare la formula: $a+b$$=a+b$, dove $a=2$, $b=-2$ e $a+b=2-2$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=0$, $b=3$ e $a/b=\frac{0}{3}$