Beginning Algebra
MTH 095
FALL 2011
Moraine Valley Community College
1.4: Intro to Variables and some Order of Operations Stuff
How’s everybody doing? Ready to rock? Excellent!
Order of Operations
The order of operations tells you what to do first in a problem with a lot of
things going on. For example, in
you’ve got multiplication and addition going on. If you start in different
places you’ll get totally different answers! Since there’s
only one right answer, let’s make sure we do it right,
okay?
PEMDAS
(sometimes people remember it as Please Excuse My Dear Aunt
Sally … never mind no one has an aunt named Sally)
can help you remember what to do when! Each letter stands for an
operation (like, multiplying) and we do them in order.
Here we go!
P
Parentheses always comes first. This includes weird brackets (like
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Documentabsolute value brackets) and, interestingly enough, long
fraction bars (when there’s a lot of stuff on the top and
the bottom of a fraction).
E
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '11
 J.King
 Algebra, Addition, Multiplication, Order Of Operations, Elementary arithmetic, Moraine Valley Community, Sally …

Click to edit the document details