
Here, ‘B’
stands for ’bracket’ ,’O’for ‘of’ , ‘D’ for’ division’ and ‘M’ for
‘multiplication’, ‘A’ for ‘addition’ and ‘S’ for ‘subtraction’.
Thus, in
simplifying an expression, first of all the brackets must be removed, strictly
in the order(), {} and [].
After
removing the brackets, we must use the following operations strictly in the
order:
(1)of
(2)division (3) multiplication (4)addition (5)subtraction.
II. Modulus of a real number : Modulus
of a real number a is defined as
|a| ={a, if a>0
-a, if a<0
Thus,
|5|=5 and |-5|=-(-5)=5
III. Virnaculum (or bar): When an expression
contains Virnaculum, before applying the ‘BODMAS’ rule, we simplify the
expression under the Virnaculum.
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