Question

how to read square cubs in easy way

Answer 1

Bring the puzzle to a square shape. The puzzle is much easier to work with when it is in the shape of a cube. ...
Top (yellow) corners. First bring all corner pieces to the corresponding layer: Hold the cube with the red side facing you and the green on the right. ...
Edges to their layers. ...
Swap corners. ...
Permute the edges. ...
Parity.