Question

caucule o valor numérico das expressões e) x + y (para x = 1/2 e y = -1/5) f) a -b (para a =3 e b = -1/2)??​

Answer 1

Resposta:

$e)\ \frac{3}{10}\\\\f)\ \frac{7}{2}$

Explicação passo-a-passo:

e ) x + y =

para :  $x=\frac{1}{2} \ e\ y=\frac{-1}{5}$:

$\frac{1}{2}+(\frac{-1}{5})=\frac{1}{2} -\frac{1}{5} =\frac{5-2}{10} =\frac{3}{10}$

f ) a - b =

para: $a=3\ e\ b=-\frac{1}{2} :$

$3-(-\frac{1}{2})=3+\frac{1}{2}=\frac{7}{2}$