# 10.1.11 Decimal Forms of Powers of Ten and Prefixes

[ SI stands for International System of Units, the modern form of the Metric System. ] The table below summarizes the decimal form for powers of 10, together with the SI prefixes and their names for reference:

Number Power SI Prefix Prefix Name
0.000001 µmicro-
0.001 m milli-
0.01 c centi-
0.1 d deci-
1 - * - *
10 da deca-
100 h hecto-
1,000 k kilo-
1,000,000 M mega-
1,000,000,000 G giga-
*The dash sign, ( - ) means there is no prefix for this value.

10.1.10 How Many Bees?