Question

Find a rational number between -1 and 1/2

Answer 1

A rational number between -1 and 1/2 is
$\frac{a + b}{2} = \frac{ - 1 + \frac{1}{2} }{2} = \frac{ \frac{ - 3}{2} }{2} = \frac{ - 3}{2} \times \frac{1}{2} \\ = \frac{ - 3}{4}$