Represent each of the following on the number line :

$\dfrac{5}{6} - \dfrac{1}{6}$

Divide the unit length OA from 0 to 1 into 6 equal parts. Then, each part represents $\dfrac{1}{6}$.

From 0 move 5 steps to the the right and then 1 step to the left to reach $\dfrac{4}{6}$.

$\therefore \dfrac{5}{6} - \dfrac{1}{6} = \dfrac{4}{6}$, as shown below.