You should KNOW (review)

1. How to correctly deal with parentheses, minus  signs and orders of operation in arithmetic.
2.  How to add, subtract, multiply and divide numerical fractions, and reduce them to lowest terms.
3.  How to add, subtract, multiply and divide algebraic fractions, and understand that the methods are the same as in 1.
4.  What rational, irrational, and real numbers  are,  how they can be thought of as points on a line, and how your calculator can be used to to approximate arithmetic with these numbers.  You should also know why the word "approximate" is used here.
5. How to represent intervals on the number line using inequalities, simple pictures, and standard interval notation.
6. What the union and intersection of two sets is, and how these can be applied to intervals.

You should be ABLE TO

1.  Correctly perform all the operations of arithmetic on common fractions both numerical and algebraic.
2.  Recognize any habitual errors you make and correct them.
3.  Locate and compare numbers as points on the line.
4.  Use interval notation and inequalities to specify sets of real numbers.