I just wanted to give anyone who is studying for the GED test math section, but is unsure of where to start a list of some things you should know. Please note that this list does NOT cover everything you need to know to pass, but is a great starting point:
-Addition and subtraction with fractions
-Multiplication and division with fractions
-Calculations with percents
-How to calculate slope and find the equation of a line
-How to find the mean, median, and mode
-How to read and solve problems with bar graphs, line graphs, pie charts, and other graphs
-How to solve algebraic equations (in other words, how to "get x by itself on one side")
-How to read and use number lines
-How to find greatest common factors
***The geometry section can be intimidating, as many don't know where to begin! Here's where to start if you aren't sure:
-Know the difference between the radius and diameter of circles
-Be able to calculate the are and circumference of circles
-Know how to find the area and perimeter of squares
-Know how to find the area and perimeter of rectangles
Know how to find the perimeter of triangles
-Know how to determine the area of a triangle
-Make sure you understand the pythagorean theorem and how to use it to find missing triangle side!
-Be able to use formulas to find the area and volumes of other shapes like spheres
**Note that you'll be given the formulas on test day, so don't worry about memorizing them!
If you can master all of this, you'll be in great shape! I'd recommend to use your GED prep books, youtube, and google to review all of these topics. You can simply copy and paste a topic into google or youtube to make it easy to find resources to use! Make sure to take good notes! Once you feel you've got this stuff down, go ahead and take some practice tests!
When you review your tests, the trick is to pay close attention to your mistakes! For every question you got wrong or were confused on, go straight to your notes and review the topic! If the topic is not in your notes, go back to your prep books, or do a google or youtube search on the topic. If you use my topic list to review, you'll know all of the basics well, but will likely come across some stuff you don't know on your practice tests. That's why it's so important to review the whole topic of the question you got wrong! The more you do this, the more you'll be filling in your gaps! Once you can consistently break the passing score for your state on your practices tests, you should be good to go!
Basically, you want to break your preparation into three phases:
1. Content review
2. Practice, practice, practice
3. Ace the test!
In addition to practice tests, I'd also recommend the problems free Test Prep Champions GED test ebook on http://www.testprepchampions.com. They're an excellent supplement to your preparation!