## Using the TI-30XS Calculator

These are instructions on performing some tasks on your TI-30XS calculator. On the test, you will have a calculator reference page with similar instructions available to you.

Fractions and Mixed Numbers

To enter a fraction in your calculator, locate the n/d button (third row, second from left). Press that button and you will be given a fraction bar with your cursor on the top. Enter the numerator. Then, press the down key on the circular direction pad to move your cursor to the denominator position. Then, enter the denominator. You must hit the right arrow on the direction pad to move out of the fraction and enter the rest of your problem.

For a Mixed Number, press the 2nd button, then the n/d button. You will then have a cursor in front of the fraction. Enter the whole number of you mixed number. Then, press the right cursor to move into the numerator position, then the down cursor to move into the denominator position. Again, you will need to use the right cursor to move out of the fraction and continue entering your problem.

To turn an improper fraction to a mixed number, or vise versa, hit 2nd, then x10n,. Then, press enter.

Roots and Powers

To square a number, enter the number, and then press the x2 button (to the left of the 7). To raise a number to a power other than 2, enter the number, and then press the exponent button above the x2. This will move your cursor into the exponent position. You must then use the right cursor to move out of the exponent position and continue entering your problem.

For a square root, press 2nd, then x2 and enter the number you would like to find the square root of. You must use the right cursor to move your cursor out of the square root. For a root other than a square root, enter the number of the root you would like to find (if it’s a cube root, this would be 3). Then, press the 2nd key and then the exponent key. Then enter the number you would like to find the root of. You may then hit enter or right cursor to continue entering a problem.

Percent

To work with a percent, you can either convert the percent to a decimal yourself (5% would be 0.05) and enter it in the calculator, or you can use the percent function on the calculator. Enter the number, then press 2nd, then press the “(“ button (above the 8).

Toggle

The toggle key (just above the enter) is used to change the form of an answer. The toggle key can change an answer or number in percent or fraction form into a decimal. This is handy when having to compare a list of percentages, fractions and decimals. For many roots, the number will not fit into a root evenly, so it will be expressed in radical form, which means that any even roots will be factored out and any remaining factors will be left inside the root symbol. To change your answer to a decimal, use the toggle key.