Practice using a Casio fx-260 calculator, the one used for the official General Education Development, or GED, test. The fx-260 is a scientific calculator capable of handling the basic calculations required to succeed on the GED. You must become familiar with the calculator and its various functions.
Write down any areas of weakness you noticed from your original exam. Include questions you were unable to attempt as well as spots where you were unsure how to move to the next step. Functional areas such as specific mathematical notations or functions you were unfamiliar with are also helpful to note. Focus on these weaknesses to prepare you for your next attempt.
Take sample tests, particularly noting any weaknesses or areas of confusion. These tests give you a range of problems to review while keeping you thinking about the math you will see on the exam. Taking these sample tests may also help jog your memory regarding specifics of your previous GED that gave you trouble.
Spend some time each day studying your math fundamentals. Re-acclimate yourself to the rules behind basic algebra and geometry. Focus on the basic properties of algebraic formulas and the fundamental rules of geometry. The GED tests your ability to use these rules, understand their meanings and solve equations using them.
Sign up for classes that focus on the math portion of the GED. These classes can be very helpful to organize the material you need to study and identify your personal weakness. They will provide their own sample tests and grade them to give you an idea of your progress. Ask questions of your instructor.
It is important for you to walk into your next GED attempt with the right mindset. Avoid letting your lack of success in your first attempt distract you on your next exam. Success on your next exam will redeem your GED score, so walk into the test with the mindset that you can and will succeed.