Question

calcule a expressão numérica
(1/2) 2+ 2/3 - 3-²​

Answer 1

Resposta:

$\left(\frac{1}{2}\right)\cdot \:2+\frac{2}{3}-3^{-2}\\\\\frac{1}{2}\cdot \:2+\frac{2}{3}-3^{-2}\\\\1+\frac{2}{3}-3^{-2}\\\\\frac{1\cdot \:3}{3}+\frac{2}{3}\\\\\frac{1\cdot \:3+2}{3}\\\\-3^{-2}+\frac{5}{3}\\\\-\frac{1}{9}+\frac{5}{3}\\\\-\frac{1}{9}+\frac{15}{9}\\\\\frac{-1+15}{9}\\\\\frac{14}{9}$