ORDER OF OPERATIONS In Algebra County

PEMDAS Anything in a parenthesis must be figured out first.

PEMDAS Exponents are next, like 3 2.

PEMDAS Then we multiply and divide; but if both are hooked together, we go in order from left to right. Divide first.

PEMDAS We really don’t “subtract,” so the last step is adding.

PEMDAS Please excuse my dear Aunt Sally

Here is an example: Parentheses first. The long fraction line is a parenthesis. We must do everything on the top and everything on the bottom before we can divide.

Also...

Expnents next.

Next is multiply or divide.

Adding is next.

Now, since we have finished everything on the top and the bottom, we can try to divide, but we do not have to change it from an improper fraction. However, we do need to divide the two negatives.

Watch it again and copy down the steps on the Worksheet that goes with this PowerPoint lesson. Push 8 and then “Enter”

Here is a second example: Parentheses first. There are two kinds of parentheses: brackets [ ], and parentheses ( ). Do the ones on the inside first.

Then do what is necessary on the inside of the brackets. multiply

Now do what is inside the brackets. add

There are no exponents. Next is multiply.

Watch it again and copy down the steps on the Worksheet that goes with this PowerPoint lesson. Type 14 and then “Enter”

Here is a third example: Parentheses first. There is another kind of parentheses: the braces { }. We already had brackets [ ] and parentheses ( ). Do the ones on the inside first.

multiplyadd

multiplyadd

multiplyadd

Watch it again and copy down the steps on the Worksheet that goes with this PowerPoint lesson. Type 19 and then “Enter”

Here is a fourth example: Parentheses first.

Inside the brackets, exponents are first. multiply

addmultiply

add

Watch it again and copy down the steps on the Worksheet that goes with this PowerPoint lesson. Type 24 and then “Enter”

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