How is math used in singing?

How is math used in singing?
When you are singing, or reading the music score, you have measures, beats, and time signatures that you have to be careful of( and also key signature). When you are performing a piece of music, you have to COUNT the beats, and COUNT the measures to keep up with the rest of the orchestra, band, or the beat.For example, when you are counting in 4/4 time, you count 1-2-3-4, 1-2-3-4.Additionally, rhythms are produced by dividing beats into smaller "chunks." There are half-beats, quarter-beats, and so forth - thus you divide the big beats into smaller lengths of sound. Such as 1 + 2 + 3 + 4 + (each + being an "and" or a half-beat. These are called eighth notes) or 1 e + a 2 e + a 3 e + a 4 e + a (there are four notes or chunks to each beat. These are called sixteenth notes).