How Can I Align The Box Numbers In The Tiled Page Boxes? (Based on the most up lefft number)

Use the align & distribute panel

https://inkscape-manuals.readthedocs.io/en/latest/align-and-distribute.html

What do you suggest by aligining? Can you tell in details?

When I align them all the numbers gathers on the most left vertically.

http://tavmjong.free.fr/INKSCAPE/MANUAL/html/Align.html

As far as I understand;

Easiest way would be

Step 1) aligning the top row manually based on the left edges of the mini boxes.

Step 2) Aligning the 3 columns automatically with the Align Tool.