Question

$\frac{0.4}{ \sqrt{2} }$·$\frac{16}{1}$ =?

Answer 1

$\frac{0.4}{\sqrt{2}}* \frac{16}{1}= \\\\ 0.4\to \frac{4}{10}=\frac{2}{5} \\\\ \sqrt{2}=1.41=\frac{141}{100} \\\\ \\ \frac{\frac{2}{5}}{\frac{141}{100}} *16= \\\\ = \frac{2}{5}*\frac{100}{141}*16= \\\\ = \frac{2}{1}*\frac{20}{141}*16= \\\\ = \boxed{\frac{640}{141}=4.53}$