The decimal number system.
Our numbers (1,2,3 etc) are based on the decimal system, or the base 10 system.
However many other number systems are in common use. Computers use a binary (base 2), octal (base 8) or hexidecimal (base 16). The faces of clocks, the months of the year, degrees in circle and dozens are all based on an old base 12 system of notation.
Fortunately the Mayan system, a vigesimal (base 20 system, has mostly died out. The only exception seems to be the interest in 2012 due to the completion of a baktun (properly b'ak'tun) of 20 katun cycles of the ancient Maya Long Count Calendar used in a recent movie.
The Metric system is based on the number 10 and its multiples, which includes numbers like 100, 1,000, 10,000, etc.
the stock system :)
The metric system is not based on the multiples of 100. It is based on the multiples of ten.
Matter is defined as that which has mass and occupies space. There are procedures to measure both. Even if you can't measure the mass of an object directly (such as a gas), you can still determine it's mass by measuring the space it occupies. Pressure is one way to measure the mass of gas by the amount of space it occupies.
A Knowledge-Based system is one that uses knowledge, reason and logic to solve sometimes complex problems. It is written as a computer program for a system.
The decimal number system.
Numbers.
numbers
binary
They are based on numbers or units being related to one another numbers by powers of 10.
It is a system based on the place value.
The numbers that we use today are based on the Hindu-Arabic numeral system whose numerals are: 0 1 2 3 4 5 6 7 8 and 9
The US system that is based on the number 10 is the base 10 system. In the base 10 system the numbers roll over every 10; example 10,20,30.
The metric system is based on numbers that end with a zero(0.1, 0.01,0.001,10, 100, 1000,etc.).
The Hindu/Arabic number system is the system of numbers which is used in most countries of the world. It is based on the numbers; 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0.
No, the Romans used used numerals while we use numbers based on the Arabic system.
The Metric system is based on the number 10 and its multiples, which includes numbers like 100, 1,000, 10,000, etc.