Question

Alguém pode me ajuda
quero cm cálculos

Answer 1

Obs.: o simbolo de asterisco * representa multiplicação!

$\left[\left(\frac{2}{5} \right)^{-1}+\left(\frac{2}{3} \right)^{0}\right]\;\times \;(0,2)^1\\\\\left[\left(\frac{5}{2} \right)+1\right]\;\times \;(0,2)\\\\\left[\left(\frac{5*1+1*2}{2} \right)\right]\;\times \;(\frac{2}{10})\\\\\left[\left(\frac{7}{2} \right)\right]\;\times \;(\frac{2}{10})\\\\\frac{7}{2}\;\times\;\frac{2}{10}\\\\\frac{7*2}{2*10}\\\\\frac{7}{10}\\\\0,7$