Question

Dê o resultado da experssão:
(0,36/0,6 + 1,2) : 9/10

Answer 1

(0,36/0,6 + 1,2): 9/10=
(0,6+1,2):0,9=
(1,8):0,9=
2

Answer 2

$\ \ \ \Big(\frac{0,36}{0,6} + 1,2\Big) : \frac{9}{10}=\Big(\frac{36/100}{6/10} + \frac{12}{10}\Big) : \frac{9}{10}\\ \\=\Big(\frac{36}{100}\cdot\frac{10}{6} + \frac{12}{10}\Big) : \frac{9}{10}=\Big(\frac{360}{600} + \frac{12}{10}\Big) : \frac{9}{10}\\ \\=\Big(\frac{360^{:120}}{600_{:120}} + \frac{12^{:2}}{10_{:2}}\Big) : \frac{9}{10}=\Big(\frac{3}{5} + \frac{6}{5}\Big) : \frac{9}{10}\\ \\=\Big(\frac{3+6}{5}\Big) : \frac{9}{10}=\frac{9}{5}: \frac{9}{10}=\frac{9}{5}\cdot \frac{10}{9}=\frac{90}{45}=2$