The writing method of dotted whole notes in simplified musical notation is: O.

The writing method of dotted half notes in simplified musical notation is: white "P" plus a dot.

The method of expressing in music score is to put a small dot in the upper right corner of the note head. This representation method is only used for the delay of notes, not the delay of rests. Dotted notes are small dots recorded on the head of a note to increase the duration of the note. Dotted notes can be divided into single dotted notes and multiple dotted notes.

If there is a dot on the right side of a note, it means that the value of the note will be increased by 1/2 on the original basis: if it is a note with two dots, It means that the duration of this note will be increased by 3/4 on the original basis.

Extended information:

Used to record the progression symbols of sounds of different lengths. Whole notes, half notes, quarter notes, eighth notes, and sixteenth notes are the most common notes. It is the most important element in the staff.

The oval part of the note is called the "note head". The note head can be divided into a solid note head and a hollow note head (the pronunciation of the note is determined by the position of the note head in the staff). The straight part is called the "stem", and the part above the head of the note that emits a wave-like shape is called the "tail".

Any note has a note head. Only whole notes and half notes have hollow note heads. Only whole notes have no stems. Only whole notes, half notes and quarter notes have no stems. The more symbols there are, the more symbols there are. The shorter the note duration (the duration decreases by 1/2 for each additional symbol).

Baidu Encyclopedia—Music Notes

Baidu Encyclopedia—Dotted Musical Notes