General Test Information: GED Math

Using a Calculator

A Casio fx-260SOLAR calculator will be provided for your use at the official GED testing center. The Casio fx-260SOLAR calculator is shown on the left. The calculator on the right shows only those keys you may find helpful for questions on the GED Mathematics Exam. The ON key is used each time you begin a new question or make an error entering a number or an operation. It is used to clear the display and to clear all parts of a calculation. Other keys to know include the following:

• +/–: the change sign key, used to enter a negative Number
• a^b/c: the fraction key, used to enter a fraction
• x²: the square key, used to square a number
• [(– – – and – – –)]: the parentheses keys, used for performing calculations involving parentheses (i.e., questions for which the order of operations is very important)
• SHIFT: the shift key, used to access the functions listed above the other keys

The Casio fx-260SOLAR performs additional functions outside of those indicated on the keys. These functions are indicated by the symbols placed above the keys. To access a function key, press the SHIFT key, release it, and then press the key below the desired function.

Alternative-Format Questions

Although 80% of the mathematics questions are multiple-choice, 20% of the questions require you to construct your own answer. Rather than select from five choices, you must record answers on either standard or coordinate-plane grids. (Alternative-format questions are always referred to as grid-in questions or constructed-response questions.) Both Parts I and II of the test have multiple-choice, standard-grid, and coordinate-plane-grid questions.

Standard grids record numerical answers.

When you are given a question with a grid, first write your answer in the blank boxes at the top of the grid. This will help keep you organized as you "grid in" the bubbles and ensure that you fill them out correctly. (You are not required to fill in the blank boxes at the top, but it will help you avoid making a careless mistake.)

You can start in any column, but leave enough columns for your whole answer. Answers can be left justified or right justified. One-digit or three-digit answers can also be centered. The number 149, for example, can be recorded on the standard grid in three ways:

You do not have to use all of the columns. If your answer takes up only two or three columns, leave the others blank.

You can write your answer by using either fractions or decimals. For example, if your answer is , you can enter it as a fraction or as a decimal, 0.25. The slash "/" is used to signify the fraction bar of the fraction. The numerator should be "bubbled in" to the left of the fraction bar and the denominator should be "bubbled in" to the right. Here are five ways to correctly record either answer.

When your answer is a mixed number, it must be represented on the standard grid in the form of an improper fraction. For example, for the answer 1, grid in 5/4.

A coordinate-plane grid is a grid on which a number is recorded by filling in one circle that represents a point. Negative numbers are possible, but fractions, mixed numbers, and decimals are not.

When you are asked to plot a point on a coordinate grid like the one shown, simply fill in the bubble where the point should appear. For example, the point (1,3) is recorded as one filled-in circle (or point) on the coordinate grid. Make sure that you completely erase all marks except the answer.

Graphics on the GED

At least 25 out of the 50 questions on the GED Mathematics Exam use diagrams, pie charts, graphs, tables, and other visual stimuli as references. Sometimes, more than one of these questions will be grouped under a single graphic. Do not let this confuse you. Learn to recognize question sets by reading both the questions and the directions carefully.