May 2019
Beginner
192 pages
3h 30m
English
Content preview from Pre-Algebra Essentials For Dummies
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Chapter 2
Evaluating Arithmetic Expressions
IN THIS CHAPTER
Understanding equations, expressions, and evaluation
Doing the Big Four operations in the right order
Working with expressions that contain exponents
Evaluating expressions with parentheses
In this chapter, I introduce you to what I call the Three E’s of math: equations, expressions, and evaluation.
You probably already know that an equation is a mathematical statement that has an equal sign 
— for example, 
. An expression is a string of mathematical symbols that you can place on one side of an equation — for example, 
. And evaluation is finding out the value of an expression as a number — for example, finding out that the expression is equal to the number 2.
Throughout the rest of the chapter, I show you how to turn expressions ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.