Applicare la formula: $\frac{a}{b}+c$$=\frac{a+cb}{b}$, dove $a/b+c=4.9-\frac{1}{4.9}$, $a=-1$, $b=\frac{49}{10}$, $c=\frac{49}{10}$ e $a/b=-\frac{1}{4.9}$

Applicare la formula: $ab$$=ab$, dove $ab=4.9\cdot 4.9$, $a=\frac{49}{10}$ e $b=\frac{49}{10}$

Applicare la formula: $a+b$$=a+b$, dove $a=24.010000000000005$, $b=-1$ e $a+b=-1+24.01$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=23.010000000000005$, $b=\frac{49}{10}$ e $a/b=\frac{23.01}{4.9}$