Represent each of the following on the number line :

$3\dfrac{3}{4}$

Let O be the origin. Set off equal distances OA, AB, BC, etc., on right hand side of O, denoting 1, 2, 3, etc.

Take 3 full distances and divide CD into 4 equal parts and take 3 parts out of it to reach the point P.

Hence, the point P represents $3\dfrac{3}{4}$.