I. 'BODMAS'Rule: This rule depicts the correct sequence in which the operations are to be executed,so as to find out the value of a given expression.

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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I. 'BODMAS'Rule:This rule depicts the correct sequence in which the operations are to be executed,so as to find out the value of a given expression.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.