What are the different types of units in maths?

Answer 1

If you mean "What are the different unit prefixes?" the answer is as follows:

Yotta (Y): 1024

Zetta (Z): 1021

Exa (E): 1018

Peta (P): 1015

Tera (T): 1012

Giga (G): 109

Mega (M): 106

Kilo (k): 103

Hecto (h): 102

Deka (da): 101

Unit: 100

Deci (d): 10-1

Centi (c): 10-2

Milli (m): 10-3

Micro (µ): 10-6

Nano (n): 10-9

Pico (p): 10-12

Femto (f): 10-15

Atto (a): 10-18

Zepto (z): 10-21

Yocto (y): 10-24