Question

3/5 - √1/4=
Como se faz?

Answer 1

$\dfrac{3}{5}-\sqrt{\dfrac{1}{4}}\\\\\\ =\dfrac{3}{5}-\sqrt{\dfrac{1}{2\cdot 2} }\\\\\\ =\dfrac{3}{5}-\sqrt{\dfrac{1}{2}\cdot \dfrac{1}{2} }\\\\\\=\dfrac{3}{5}-\sqrt{\left(\dfrac{1}{2}\right)^{\!\!2}}\\\\\\=\dfrac{3}{5}-\dfrac{1}{2}\\\\\\ =\dfrac{6}{10}-\dfrac{5}{10}\\\\\\ =\dfrac{1}{10}$


Bons estudos! :-)