1.1: Why It Matters Review
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 51434
Why review topics from earlier math classes?
You have been in class all day, running around, picking up your kids from daycare and after a long, brutal commute you get home to realize you haven’t thought about what to fix for dinner. You go to the fridge and all you see are leftovers, a jumble of unrelated bits and pieces from meals past. Despite your fatigue, you manage to cobble together a meal that everyone will eat willingly and to get on with your evening.
In this section, you may feel like the topics are a cobbledtogether meal of leftovers. The goal is to give you a reminder of some of the skills and topics from earlier math classes that, like the box of leftovers in the back of your fridge, are easily forgotten by most people. Because sometimes we just forget how these concepts work . . . until we need them again.
Learning Outcomes

Arithmetic With Fractions
 Add and subtract fractions
 Multiply fractions
 Divide fractions

Arithmetic of Real Numbers
 Add and subtract real numbers
 Multiply and divide real numbers
 Simplify expression with real numbers
 Simplify compound expression with real numbers

Percent
 Explain the basics of percents
 Solve equations containing percents
 Solve percent change and interest problems
As you work through the rest of the sections of this course, please return to this review if you feel like you need a reminder of the topics covered. These topics were chosen because they are often forgotten and are widely used throughout the course. Don’t worry, just like ketchup, these concepts have a long shelf life.