Applicare la formula: $\frac{a}{b}+c$$=\frac{a+cb}{b}$, dove $a/b+c=\frac{1}{5}+0.3$, $a=1$, $b=5$, $c=\frac{3}{10}$ e $a/b=\frac{1}{5}$

Applicare la formula: $ab$$=ab$, dove $ab=0.3\cdot 5$, $a=\frac{3}{10}$ e $b=5$

Applicare la formula: $a+b$$=a+b$, dove $a=1$, $b=\frac{3}{2}$ e $a+b=1+1.5$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=\frac{5}{2}$, $b=5$ e $a/b=\frac{2.5}{5}$