In mathematics, an operation is a logical process aimed at obtaining a result from one or more objects.
The objects which intervene in an operation are called operands. Writing an operation usually involves the use of specific symbols called operators.
The following section on operations in real numbers covers these topics:
In some operations, it may be necessary to use the opposite number and the reciprocal of a number.
For every positive number, there is a negative opposite number. The sum of two opposite numbers is always zero.
|4+-4=0| and |-4+4=0|
|9+-9=0| and |-9+9=0|
A number is the reciprocal of another if the product of the 2 numbers is 1. Usually, the reciprocal of a real number |a| will be |\displaystyle\frac{1}{a}|.
|5\times\displaystyle\frac{1}{5}=1| and |\displaystyle\frac{1}{5}\times5=1|
|8\times\displaystyle\frac{1}{8}=1| and |\displaystyle\frac{1}{8}\times8=1|
According to the definition, the reciprocal of a number |\displaystyle\frac{a}{b}| will be |\displaystyle\frac{b}{a}|.
Thus:
|\displaystyle\frac{2}{3}\times\displaystyle\frac{3}{2}=\displaystyle\frac{6}{6}=1|
