What is Decimal?

Decimal is a term that
describes the base-10 number system, probably the most commonly used
number system. The decimal number system consists of ten single-
digit numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. The number
after 9 is 10. The number after 19 is 20 and so forth. Additional
powers of 10 require the addition of another positional digit.

In computing, the
binary ,
octal , or
hexadecimal number system may be used instead of the decimal
system. All these schemes have a number of digits that is a power of
2. This is an advantage in systems that use high and low digital
states.

The **decimal**
numeral system (also called **base ten** or occasionally
**denary**) has
ten as its
base. It is the numerical base most widely used by modern
civilizations.^{[1]}^{[2]}

**Decimal notation** often
refers to a base-10
positional notation such as the
Hindu-Arabic numeral system; however, it can also be used
more generally to refer to non-positional systems such as
Roman or
Chinese numerals which are also based on powers of ten.

**Decimals** also refer to
decimal fractions, either separately or in contrast to
vulgar fractions. In this context, a decimal is a tenth
part, and decimals become a series of nested tenths. There was a
notation in use like 'tenth-metre', meaning the tenth decimal of
the metre, currently an
Angstrom. The contrast here is between decimals and vulgar
fractions, and decimal divisions and other divisions of
measures, like the inch. It is possible to follow a decimal
expansion with a vulgar fraction; this is done with the recent
divisions of the troy ounce, which has three places of decimals,
followed by a trinary place.

**Decimal place:**

**1****
**- The position of a digit to the right of a decimal point,
usually identified by successive ascending ordinal numbers with
the digit immediately to the right of the decimal point being
first. (The American
Heritage® Dictionary of the English Language, Fourth Edition
copyright ©2000 by Houghton Mifflin Company. Updated in 2009.
Published by
Houghton Mifflin Company. All rights reserved.)

**2 **-The position of a digit
to the right of the decimal point in a number written in decimal
notation. In 0.079, for example, 0 is in the first decimal
place, 7 is in the second decimal place, and 9 is in the third
decimal place.

__
__**
Mixed operation with
decimals**

Perform
mixed operations of addition and subtraction of decimals up to 3
decimal places

Add and
subtract three to four decimal numbers of up to 3 decimal places,
involving

a.
decimal numbers only

b. whole
numbers and decimal numbers.