ORDER OF OPERATIONS: Example 2
 Rule 21:

Expressions in parenthesis are treated as one
number and must be calculate first.
Example 2: Calculate .
Answer: The answer is 100.

Solution:
 Since there are parenthesis in the problem. Work from
left to right. The left parenthesis contains multiplication, division, and addition.
Complete the multiplication and division first. can be modified to
= .
The right parenthesis contains multiplication, division,
addition, and subtraction. Perform the multiplication and division
first. can be modified to
.
The original problem
can be written as .
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Author: Nancy
Marcus