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Beginning Algebra ch1.4

# Beginning Algebra ch1.4 - Beginning Algebra MTH 095 FALL...

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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

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absolute 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
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Beginning Algebra ch1.4 - Beginning Algebra MTH 095 FALL...

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