Applicare la formula: $a+b$$=a+b$, dove $a=\frac{9}{25}$, $b=-10$ e $a+b=0.36+1.24-10+8.84+0.64$

Applicare la formula: $a+b$$=a+b$, dove $a=\frac{31}{25}$, $b=-\frac{241}{25}$ e $a+b=-9.64+1.24+8.84+0.64$

Applicare la formula: $a+b$$=a+b$, dove $a=\frac{221}{25}$, $b=-\frac{42}{5}$ e $a+b=-8.4+8.84+0.64$

Applicare la formula: $a+b$$=a+b$, dove $a=\frac{11}{25}$, $b=\frac{16}{25}$ e $a+b=0.44+0.64$