Salutare!
[tex]\bf \dfrac{1}{2} -\dfrac{1}{8}\cdot 2^{4} =[/tex]
[tex]\bf \dfrac{1}{2} -\dfrac{1}{2^{3}}\cdot 2^{4} =[/tex]
[tex]\bf \dfrac{1}{2} -\dfrac{1}{\not2^{3}}\cdot \not2^{4} =[/tex]
[tex]\bf \dfrac{1}{2} -\dfrac{1}{1}\cdot 2^{1} =[/tex]
[tex]\bf \dfrac{1}{2} - 2 =[/tex]
[tex]\bf \dfrac{1}{2} - \dfrac{2}{1} =[/tex]
[tex]\bf \dfrac{1}{2} -\dfrac{2\cdot2}{2} =[/tex]
[tex]\bf \dfrac{1-4}{2} =[/tex]
[tex]\boxed{\bf -\dfrac{3}{2} }[/tex]
