Basic Operations
When performing addition, subtraction, multiplication, and division, the TI-83 uses the standard order of operations. The use of parentheses may be required for some expressions.
Examples:
Note the difference between the negative (-) button on the bottom row of the keypad and the subtract - button on the far right side of the keypad.
2 nd
Anything that appears in yellow lettering on the keypad must be accessed by first pushing the yellow button labeled 2 nd.
Examples:
Powers
To square a number you can use the x 2 button on the far left side of the keypad. To raise a number to a power higher than 2, use the ^ button on the far right side of the keypad.
Examples:
Roots
To take the square root of a number you may use 2nd squared, as an example 1b. To take higher oder roots, you use the MATH menu.
Examples:
Editing
Use 2 nd ENTRY to recall previously-entered expressions. Then edit the expression using the arrow keys, DEL, or 2 nd INS.
Examples:
Converting Decimals to Fractions
Example:
Graphing
Most graphing operations are performed using the five blue buttons at the very top of the keypad. Their functions are listed below.
Setting the Window and Graphing A Function
Push the WINDOW button and use the arrow keys to change the settings to match the following.
Tracing
While looking at the graph, hit TRACE. You will notice that the bottom of the screen contains the coordinates X=0 and Y=5. As you move left or right (by using the arrow keys) you will see these coordinates change as the cursor moves. However, the coordinates are rather messy -- for example, one point on the graph is X=1.0638298, Y=7.2176596. What is you want to know what happens when X is exactly 1? While using the TRACE feature, just hit the 1 button on the main keypad, then hit ENTER. The cursor is now located at X=1, Y=7. Try this again by entering some other numbers like 4 or negative 5.
Zooming
To zoom in on a certain part of the graph, type ZOOM 2 . You will notice the graph has not changed. The calculator is waiting for you to tell it what part of the line you would like to zoom in on. Use the arrow keys to move the cursor anywhere on the screen. Then hit ENTER. You are now looking at a portion of the original graph up close. To zoom out, simply push Zoom 3 ENTER.