Question

um numero a e tal que

Answer 1

$A= (\frac{-0,25}{-2}) - (\frac{-0,5}{-2}) \\ \\ A= (\frac{ \frac{-25}{100} }{-2})-(\frac{ \frac{-50}{100} }{-2}) \\ \\ A= (\frac{-25}{100}* \frac{-1}{2})-( \frac{-50}{100}* \frac{-1}{2} ) \\ \\ \frac{25}{200}- \frac{50}{200} \\ \\ \frac{75:5}{200:5}= \frac{15:5}{40:5}= \frac{3}{8}$