Rule 21: Order of Operations
Expressions in parenthesis are treated as one
number and must be calculate first.
Example: Calculate .
Answer: The answer is 16.

Solution:
 Since there parenthesis in the problem. Work from
left to right. The parenthesis
contains multiplication and addition. Complete the multiplication
first. can be modified to
.
The problem can now be written .
The remaining parenthesis
contains multiplication and addition. Complete the multiplication
first. can be modified to
.
The problem can now be written as
which in turn can be simplified to .
If you would like to review more examples, click on the word
Example.
Work the following problems and click on Answer to check your results.
 Problem 1:
Calculate .
Answer
 Problem 2:
Calculate .
Answer
 Problem 3:
Calculate .
Answer
[Identification]
[Factoring Integers]
[Reducing Fractions]
[Multiplication]
[Division]
[Building Fractions]
[Addition]
[Subtraction]
[Order of Operation]
S.O.S MATHematics home page
Do you need more help? Please post your question on our
S.O.S. Mathematics CyberBoard.
Author: Nancy
Marcus
Copyright © 19992014 MathMedics, LLC. All rights reserved.
Contact us
Math Medics, LLC.  P.O. Box 12395  El Paso TX 79913  USA
users online during the last hour