The Casio FX 83 is a scientific calculator with special modes for statistical calculations, general mathematics and generating number tables. The calculator is a great aid for anyone studying math at school, or in college. It displays equations in a natural format, and the controls are tailored to that, in that many buttons' functions are indicated by a picture. This makes the FX 83 relatively easy to operate.

- Skill level:
- Easy

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## Instructions

- 1
Slide the front cover downward to remove it. This can be simply reattached over the back of FX 83.

- 2
Press the "On" button. This is in the top right-hand corner of the calculator, and is oval shaped and violet. The FX 83's display screen will switch on.

- 3
Press the "Mode" button. This is to the left of the "On" button. You may notice that "Mode" has "Setup" written beside it in yellow. This is the alternate function of this button. A quick glance at the buttons will tell you that a lot of them have dual functions. These are all written above the button itself, and are either yellow or purple. These alternate functions are activated either by pressing "Shift" (for the operations in yellow) or "Alpha" (any operation written in purple). These two buttons are under the display screen and to the left.

- 4
Press "1" to select "Comp." This is the mode that is used for any general calculations. The other options from the "Mode" screen are "Stat" and "Table." "Stat" is used to show statistical or regression calculations and "Table" is used to create mathematical tables.

- 5
Hold "Shift" and press "Mode" to enter the "Setup" menu (as designated by the alternative function). Pressing "Down" or "Up" on the circular four-way navigation button displays the next page of "Setup" options. The two important options at this point are on the first page, and appear as "MthIO" and "LineIO." These stand for "Math" and "Linear" respectively. In "Math" mode, the equations display as they would when you write them down, for example, with fractions taking up two lines. In "Linear" mode, the entire equation will display on a single line. Choose "Math" mode by pressing "1." This is actually the default setting, but it is important to know how to select or change it.

- 6
Enter your desired calculation. The FX 83's buttons operate as was described earlier. For example, say you want to calculate two thirds add a quarter. Press the "Fraction" button. This is located on the left hand side of the calculator, towards the top, and is shown by a shaded rectangle above a hollow rectangle, separated by a horizontal line.

- 7
Press "2," then press "Down" on the four-way directional button. Press "3" to input it as the denominator. Now, press "+," which is located to the right of the number "3" and then repeat the process above, but enter "1" and "4" as the numerator and denominator. Finally, press "=" to display the answer. The "=" button is in the bottom right corner of the FX 83.