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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