Question

Find a rational number exactly halfway between:
$\frac{-1}{3}$ and $\frac{1}{3}$

Answer 1

As we know that exactly halfway between two rational numbers is $\frac{a+b}{2}$
Rational numbers are $\frac{-1}{3}$and $\frac{1}{3}$
Here, $a=\frac{-1}{3}$and $b=\frac{1}{3}$
$\therefore \frac{a+b}{2}=\frac{\frac{-1}{3}+\frac{1}{3}}{2}$
$=\frac{0}{2}$
$=0$
Therefore, the exactly halfway between $\frac{-1}{3}$and $\frac{1}{3}$is zero.