Question

Resolva as operações:

Answer 1

a) $\left(-\dfrac{3}{5}\right)\cdot \left(+\dfrac{5}{7}\right)\cdot \left(-\dfrac{1}{2}\right)$

$\dfrac{-3\cdot 5\cdot -1}{5\cdot 7\cdot 2}$

$\dfrac{15}{70}$

$\dfrac{3}{14}$

b) $-\dfrac{3}{4} + 0,5 - \dfrac{4}{3}$

$-\dfrac{3}{4} + \dfrac{1}{2} - \dfrac{4}{3}$

$\dfrac{-9 + 6 - 16}{12}$

$-\dfrac{19}{12}$

c) $\left(-\dfrac{3}{5}\right)\div \left(+\dfrac{5}{7}\right)$

$-\dfrac{3}{5}\cdot \dfrac{7}{5}$

$-\dfrac{21}{25}$

d) $(-2,5)^2$

$(-\dfrac{5}{2})^2$

$\dfrac{25}{4}$

e) $\left(-\dfrac{1}{3}\right)^3$

$-\dfrac{1}{27}$