Question

conta e resposta de (2-1/2)2*(1 2/5)???

Answer 1

$(2 - \dfrac{1}{2})^2 * (1 \dfrac{2}{5})$

mmc do primeiro termo = 2

$(\dfrac{4 - 1}{2})^2 * (\dfrac{2}{5}) \\ \\ \\ (\dfrac{3}{2})^2 * (\dfrac{2}{5}) \\ \\ \\ (\dfrac{3^2}{2^2}) * (\dfrac{2}{5}) \\ \\ \\ (\dfrac{9}{4}) * (\dfrac{2}{5}) \\ \\ \\ \dfrac{9 * 2}{4 * 5} \\ \\ \\ \dfrac{18}{20} \\ \\ \\ => \dfrac{9}{10}$