What does the letters means in KHDMDCM IN MATH?

Answer 1

One phrase to remember these letters is, "King Henry Died Monday Drinking Chocolate Milk." The letters stand for the metric prefixes:

Kilo = 1000

Hecto = 100

Deka = 10

(Meter) (1)

Deci = 0.1

Centi = 0.01

Milli = 0.001

Answer 2

"Dose" is a measured portion of a medicine. I am not aware that KHDMDCM have anything to do with measured quantities of medication!Perhaps you meant "does". The letters are some of the initial letters for measurement units used in length in the metric system.K = kilometre = 1000 metres
H = Hectometre = 100 metres
D = Decametre = 10 metres
M = Metre
D = Decimetre = 0.1 metres
C = Centimetre = 0.01 metres, and
M = Millimetres = 0.001 metres.They are NOT abbreviations for the measurement units since there are duplicates.