Basic TI-83 Manuale elenco delle parti

Basic TI-83 Graphing Calculator Functions

Coach Joyner’s 8th Grade Mathematics

Clear the home

screen.

Press the key.

Enter a number,

perform an

operation, or display

a function or menu

printed on the key.

Press the key. (Pictures of the calculator keys will be shown in a

box in this introduction.)

Example:

Press to add 3+5.

Press to see the MATH menu options.

Perform the function

printed in gold

above the key.

Use the gold key to access the appropriate key

underneath the function written in gold. (Anytime you see

letters or a term enclosed in brackets [ ] in this introduction it

means to push the key right below the letters or term.) When

you press the key, the cursor will change to an arrow

pointing up while it waits for you to press the next key. This

arrow means that the next key you push will activate the

symbol or operation printed in gold above the key.

Example:

Press [ π] to display the symbol for pi. Notice that when

you press the decimal value for pi appears.

Enter a letter or

character.

Use the green key to access the character or letter

printed above it in green. To enter several letters in a row, press

[A-LOCK]. The cursor changes to a blinking A. To stop

entering letters, press ."

Example:

Press [A] to display the letter A on the screen. If there

is a value stored for the variable A, it will appear when you

press .

Return to the home

screen from any

other screen.

Press and release the key, then press [QUIT].

CLEAR

MATH

ENTER

2nd

ENTER

ALPHA

2nd

ALPHA

ENTER

2nd

Basic TI-83 Graphing Calculator Functions

Coach Joyner’s 8th Grade Mathematics

Change the way a

number or graph is

displayed.

Use the key and move the cursor to the type of display

you want, then press . The modes are described in

detail on pages 1-9 to 1-12 in the Manual.

Example:

Numbers are usually displayed with a floating number of

decimal places, or as many as is needed. To display numbers

with a fixed number of 2 decimal places, press . Use

the cursor keys to move the blinking cursor to the 2 on the

second line and press . Press [QUIT] to return to

the home screen. Enter the number 5.236 and press .

The number should display as 5.24 rounded to 2 decimal

places. (Remember to press again to set the display

back to Float.

Respond to an error

message.

If you try to enter an "illegal" operation, the calculator will

display an error message. You have 2 choices of how to

respond. You may press option 1:Goto to go back to the entry.

The cursor will be flashing at or after the place where the error

was made. The error can then be fixed. Your other choice is to

press option 2:Quit to return to the home screen. For a complete

listing of error messages, see pages B-6 to B-10 in the Manual.

Example:

To see what happens when you try to divide by zero, press

. The screen display should look like this:

ERR:DIVIDE BY 0

1:QUIT

2:Goto

Press or to quit and return to the home screen.

MODE

ENTER

MODE

ENTER

2nd

ENTER

MODE

ENTER

Basic TI-83 Graphing Calculator Functions

Coach Joyner’s 8th Grade Mathematics

Use the answer in

another calculation.

The answer to the last expression evaluated is stored as a

variable called Ans. To perform an operation on the last

answer, you can simply press the operation and other key(s)

required and the answer will be used as the first number in the

expression. To use the last answer in a new expression, press

[ANS]at the location where the answer is needed.

Examples:

1) Add 20+3: Press . The display will

return 23.

2) Multiply this last answer by 5.

Press [ANS].

The display should show:

Ans*5

115

3) If you begin an entry with an arithmetic operation, the

calculator will assume you mean to operate on the value in

[ANS], and will supply it automatically. Suppose you now want

to divide the last answer by 2.

Press and the answer is 57.5 since the value

stored in [ANS] was 115.

The display will show:

Ans/2

57.5

4) Calculate the sum of 13.6 and 20.2, then divide 150 by the

result.

Press

Press [ANS]

The display should show:

13.6 + 20.2

33.8

150/Ans

4.437869822

2nd

ENTER

2nd

ENTER

2nd

ENTER

Basic TI-83 Graphing Calculator Functions

Coach Joyner’s 8th Grade Mathematics

Repeat an entry to

perform another

calculation.

Press [ENTRY]"to repeat the last entry on the screen. It may

then be edited and executed again. If you continue to press

[ENTRY], you will be able to access earlier entries that you can

edit or execute. The Last Entry storage area keeps as many

previous entries as possible until it is full.

Edit an entry.

Press one of the cursor keys to move around the screen. You

may simply reenter a number or symbol over the blinking

cursor.

To insert new numbers or symbols, press [INS]. The cursor

changes from a solid blinking square to a blinking underline

showing that you are in insert mode. Once you move the cursor

or press , then you will return to normal mode.

To delete numbers or symbols, press the key. It will delete

the character at the cursor.

Manage the memory

in the calculator.

Press [MEM]to access the MEMORY menu. Option 1: About

will display the operating system version in the calculator. If

you need to free up some memory to run new items such as

programs, you may need to delete some items. Option 2: Mem

Mgmt/Del... will give a list of choices from which items may be

deleted. Do not delete from memory unless you know exactly

what you are doing; items deleted from memory cannot be

retrieved. See pages 18-1 to 18-20 in the Manual for more

information about memory management.

2nd

ENTER

DEL

2nd

Basic TI-83 Graphing Calculator Functions

Coach Joyner’s 8th Grade Mathematics

Numerical Computations

Add, subtract,

multiply or divide

integers or decimals.

Enter the numbers and operation symbols required. Press

to see the result. The logic of the calculator uses the

standard for order of operations, which means basic operations

are performed in this order: 1) operations in parentheses; 2) all

multiplication and division from left to right; 3) all addition and

subtraction from left to right. To enter a negative number, first

press the key on the bottom row. Do not press the blue

subtraction key. See page 1-23 in the Manual for more

information on the order of evaluation in an expression.

Example:

Calculate 13.6 + -8(6.3 −5)

Press

The display should show:

13.6 + -8(6.3 −5)

3.2

Operate with

fractions.

An answer to a rational expression can be expressed either as a

decimal or a fraction. The result of fraction operations will be

expressed as a decimal unless you choose to express it as a

fraction. Option 1:Frac"on the MATH menu will express the

result as a fraction. To express a fraction as a decimal, choose

option 2:Dec from the MATH menu.

Examples:

•Add 1

2+ 1

Press

The display should show:

1/2 + 1/3 Frac

5/6

•Display 0.525 as a fraction.

Press

The display should show:

0.525 Frac

21/40

ENTER

( - )

(

−

)

ENTER

MATH

ENTER

MATH

ENTER

Basic TI-83 Graphing Calculator Functions

Coach Joyner’s 8th Grade Mathematics

Use exponents, roots,

and radicals.

Raising a number to a power or finding a root can be done in

several ways. The most common operations of squaring a

number or finding the square root can be found directly on the

keyboard. Cubing a number or finding the cube root are

options which are found on the MATH menu. To raise to

other powers or roots, press the "" key after the expression that

you are raising to a power, then enter the power. (If you use

option 5 on the math menu,

, you must enter the value for x

first, then select option 5, press , then enter the number

for which you wish to find the root.)

Examples:

To find 252, press .

To find

, press [].

To find 53, press .

To find

, press .

To find 54, press .

To find

, or 81.25, press

(or ).

Find absolute value.

Finding the absolute value is found on the NUM menu.

Press , then use the blue right cursor key to move to the

NUM menu at the top of the screen. The first function listed

there, 1:abs( , finds the absolute value.

Example:

To find | -8 |, press .

To find | -8 + 3 |, press

ENTER

X 2

ENTER

2nd

ENTER

MATH

ENTER

MATH

ENTER

(

)

MATH

(-)

)

ENTER

MATH

(-)

)

ENTER

Basic TI-83 Graphing Calculator Functions

Coach Joyner’s 8th Grade Mathematics

Use scientific

notation.

To enter a number written in scientific notation, use the [EE] key

to express the power of 10.

Example:

Enter 9.5 x 10-3 on the calculator.

Press [EE] .

The display should show:

9.5E-3

.0095

To display numbers and results in scientific notation, the

settings must be changed to Sci. To do this, press

. Make sure that Sci has been

highlighted. Press [QUIT] to return to the home screen.

Enter the number 189654.2 and press . The display

should show:

189654.2

1.896542E5

To return the display to normal, press , choose

Normal, and press .

2nd

(-)

MODE

ENTER

2nd

ENTER

MODE

ENTER

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