Finger exercises and scale exercises
Chopin etude No. 1, with fingerings for the left hand and exercises
My piano philosophy
Repeat each exercise several times.
Only the scales should be played on the piano. The finger exercises should be practised on a desk or on one's thighs.
The notation shows the relative position of the fingers; the exact distances between the fingers are free and should be comfortable.
Scale exercises, e.g. in D-flat major: