Example 2: To determine the roots of Y = X(X + 1)(X 2)

!5(G-SLV).

7 Quick-Start
1(ROOT). Press e for other roots.
Example 3: Determine the area bounded by the origin and the X = 1 root obtained for Y = X(X + 1)(X 2)

!5(G-SLV)6(g).

3(dx).

3. Use

d to move the pointer to the location where X = 1, and then press w. Next, use e to
move the pointer to the location where X = 0, and then press
w to input the integration range,
which becomes shaded on the display.

8 Quick-Start

DUAL GRAPH
With this function you can split the display between two areas and display two graph windows.
Example: To draw the following two graphs and determine the points of intersection
Y1 = X(X + 1)(X 2) Y2 = X + 1.2

!mcc1(G+G)

to specify G+G for the Dual Screen setting.
J, and then input the two functions. v(v+b) (v-c)w v+b.cw 6(DRAW) or w to draw the graphs.

3. Press

Box Zoom
Use the Box Zoom function to specify areas of a graph for enlargement. 1. Press

!2(ZOOM) 1(BOX).

2. Use to move the pointer to one corner of the area you want to specify and. then press

defc w

9 Quick-Start
3. Use to move the pointer again. As you do, a box appears on the display. Move the pointer so the box encloses the area you want to enlarge.
4. Press , and the enlarged area appears in the inactive (right side) screen.

DYNAMIC GRAPH

Dynamic Graph lets you see how the shape of a graph is affected as the value assigned to one of the coefficients of its function changes.
Example: To draw graphs as the value of coefficient A in the following function changes from 1 to 3

Y = AX

and then press
d e f c to highlight DYNA, w.

10 Quick-Start

4. Press (VAR) of 1 to coefficient A.
bw to assign an initial value

5. Press

2(SET) bwdwb
wto specify the range and increment of change

in coefficient A.

6. Press
7. Press (DYNA) to start Dynamic Graph drawing. The graphs are drawn 10 times. To interrupt an ongoing Dynamic Graph drawing operation, press

11 Quick-Start

TABLE FUNCTION
The Table Function makes it possible to generate a table of solutions as different values are assigned to the variables of a function.

Example: To create a number table for the following function

Y = X (X+1) (X2)

TABLE, and then press

defc to highlight w.

v(v+b) (v-c)w

4. Press table.

6(TABL) to generate the number
To learn all about the many powerful features of this calculator, read on and explore!
Precautions when Using this Product
A progress bar and/or a busy indicator appear on the display whenever the calculator is performing a calculation, writing to memory (including Flash memory), or reading from memory (including Flash memory).

Busy indicator

Progress bar Never press the P button or remove the batteries from the calculator when the progress bar or busy indicator is on the display. Doing so can cause memory contents to be lost and can cause malfunction of the calculator. This calculator is equipped with Flash memory for data storage. It is recommended that you always backup your data to Flash memory. For details about the backup procedure, see 12-7 MEMORY Mode in the Users Guide. You can also transfer data to a computer using the Program-Link software (FA-124) that comes bundled with the calculator. The Program-Link software can also be used to backup data to a computer.

u fx-9860G SD only

If the message No Card appears even though an SD card is loaded in the SD card slot, it means that the calculator is not recognizing the card for some reason. Try removing the card and then loading it again. If this does not work, contact the developer of the SD card. Note that some SD cards may not be compatible with this calculator.
Precautions when Connecting to a Computer
A special USB driver must be installed on your computer in order to connect to the calculator. The driver is installed along with the Program-Link software (FA-124) that comes bundled with the calculator. Be sure to install the Program-Link software (FA-124) on your computer before trying to connect the calculator. Attempting to connect the calculator to a computer that does not have the Program-Link software installed can cause malfunction. For information about how to install the Program-Link software, see the Users Guide on the bundled CD-ROM.

d f (x) x=a } dx d 2 f (x)x = a } {d2/dx2}. {starts natural input of quadratic differential dx 2 b {dx} {starts natural input of integral f (x)dx } a
{d/dx}. {starts natural input of linear differential {(} {starts natural input of calculation

f ( x) }

u Math Input Mode Input Examples
This section provides a number of different examples showing how the MATH function menu and other keys can be used during Math input mode natural input. Be sure to pay attention to the input cursor position as you input values and data. Example 1
To input 23 + 1 AcM d e +b w
1-3-11 Inputting and Editing Calculations

Example 3

2 To input 1+ 5 A(b+

$ cc f e )x

To input 1+

x + 1dx

Ab+4(MATH)6(g)1(dx) a+(X)+b

ea fb e

1-3-12 Inputting and Editing Calculations

Example 4

u When the calculation does not fit within the display window Arrows appear at the left, right, top, or bottom edge of the display to let you know when there is more of the calculation off the screen in the corresponding direction.
When you see an arrow, you can use the cursor keys to scroll the screen contents and view the part you want.

To input 2

Ac*4(MATH)1(MAT)1(22)

)cee$bcc

1-3-13 Inputting and Editing Calculations
u Inserting a Function into an Existing Expression
In the Math input mode, you can make insert a natural input function into an existing expression. Doing so will cause the value or parenthetical expression to the right of the cursor to become the argument of the inserted function. Use !D(INS) to insert a function into an existing expression. u To insert a function into an existing expression Example
To insert the function into the expression 1 + (2 + 3) + 4 so the parenthetical expression becomes the argument of the function
1. Move the cursor so it is located directly to the left of the part of the expression that you want to become the argument of the function you will insert.
2. Press !D(INS). This changes the cursor to an insert cursor (').
3. Press !x( This inserts the

) to insert the

function.
function and makes the parenthetical expression its argument.
u Function Insert Rules The following are the basic rules that govern how a value or expressions becomes the argument of an inserted function. If the insert cursor is located immediately to the left of an open parenthesis, everything from the open parenthesis to the following closing parenthesis will be the argument of the inserted function. If the input cursor is located immediately to the left of a value or fraction, that value or fraction will be the argument of the inserted function.
# In the Linear input mode, pressing !D(INS) will change to the insert mode. See page 1-3-2 for more information.

To display the program (PRGM) menu, first enter the RUN MAT or PRGM mode from the Main Menu and then press !J(PRGM). The following are the selections available in the program (PRGM) menu. {COM}. {program command menu} {CTL}. {program control command menu} {JUMP}. {jump command menu} {? }. {input prompt} {^}. {output command} {CLR }. {clear command menu} {DISP }. {display command menu} {REL}. {conditional jump relational operator menu} {I/O}.. {I/O control/transfer command menu} {:}. {multistatement connector} The following function key menu appears if you press !J(PRGM) in the RUN MAT mode or the PRGM mode while binary, octal, decimal, or hexadecimal is set as the default number system. {Prog}. {program recall} {JUMP}/{?}/{^}/{REL}/{:} The functions assigned to the function keys are the same as those in the Comp mode. For details on the commands that are available in the various menus you can access from the program menu, see 8. Programming.
1-7-1 Using the Setup Screen
1-7 Using the Setup Screen
The modes Setup screen shows the current status of mode settings and lets you make any changes you want. The following procedure shows how to change a setup.

u To change a mode setup

1. Select the icon you want and press w to enter a mode and display its initial screen. Here we will enter the RUN MAT mode. 2. Press !m(SET UP) to display the modes Setup screen. This Setup screen is just one possible example. Actual Setup screen contents will differ according to the mode you are in and that modes current settings.
3. Use the f and c cursor keys to move the highlighting to the item whose setting you want to change. 4. Press the function key (1 to 6) that is marked with the setting you want to make. 5. After you are finished making any changes you want, press J to exit the Setup screen.
k Setup Screen Function Key Menus
This section details the settings you can make using the function keys in the Setup screen. indicates default setting.

u Input Mode

{Math}/{Line}. {Math}/{Linear} input mode
1-7-2 Using the Setup Screen
u Mode (calculation/binary, octal, decimal, hexadecimal mode)
{Comp}. {arithmetic calculation mode} {Dec}/{Hex}/{Bin}/{Oct}. {decimal}/{hexadecimal}/{binary}/{octal}
u Frac Result (fraction result display format)
{d/c}/{ab/c}. {improper}/{mixed} fraction
u Func Type (graph function type)
Pressing one of the following function keys also switches the function of the v key. {Y=}/{r=}/{Parm}/{X=c}. {rectangular coordinate}/{polar coordinate}/{parametric coordinate}/ {X = constant} graph {Y>}/{Y<}/{Yt}/{Ys}. {y>f(x)}/{y<f(x)}/{yf(x)}/{yf(x)} inequality graph

*1To turn off rounding, specify 10 for the significant number of digits. *2You can combine the contents of multiple function memory (fn) locations or graph memory (Yn, rn, Xtn, Ytn, Xn) locations into composite functions. Specifying fn1(fn2), for example, results in the composite function fn1fn2 (see page 5-3-3). A composite function can consist of up to five functions. #You cannot use a differential, quadratic differential, integration, , maximum/minimum value, Solve, RndFix or log ab calculation expression inside of a RndFix calculation term.

20070101 20061001

2-1-4 Basic Calculations
2 Type B functions With these functions, the value is entered and then the function key is pressed. x2, x1, x!, , ENG symbols, angle unit , r, g 3 Power/root ^(xy), x' 4 Fractions a b/c 5 Abbreviated multiplication format in front of , memory name, or variable name. 2, 5A, etc. 6 Type C functions With these functions, the function key is pressed and then the value is entered. ', 3', log, In, ex, 10x, sin, cos, tan, sin1, cos1, tan1, sinh, cosh, tanh, sinh1, cosh1, tanh1, (), d, h, b, o, Neg, Not, Det, Trn, Dim, Identity, Sum, Prod, Cuml, Percent, AList, Abs, Int, Frac, Intg, Arg, Conjg, ReP, ImP 7 Abbreviated multiplication format in front of Type A functions, Type C functions, and parenthesis. 2' A log2, etc. 3, 8 Permutation, combination nPr, nCr, 9 , 0 +, ! Relational operators =, , >, <, , @ And (logical operator), and (bitwise operator) # Or (logical operator), or, xor, xnor (bitwise operator)

Example

2 + 3 (log sin22 + 6.8) = 22.07101691 (angle unit = Rad)
#When functions with the same priority are used in series, execution is performed from right to left.
#Compound functions are executed from right to left. #Anything contained within parentheses receives highest priority.

exIn 120 ex{In( 120)}

Otherwise, execution is from left to right.

2-1-5 Basic Calculations

kMultiplication Operations without a Multiplication Sign
You can omit the multiplication sign () in any of the following operations. Before Type A functions (1 on page 2-1-3) and Type C functions (6 on page 2-1-4), except for negative signs Example 3, 2sin30, 10log1.2, 2' 2Pol(5, 12), etc.

k Coordinate Conversion

u Rectangular Coordinates u Polar Coordinates
With polar coordinates, can be calculated and displayed within a range of 180< < 180 (radians and grads have same range). Be sure to specify Comp for Mode in the Setup screen. Example Calculate r and when x = 14 and y = 20.24.989 24.98979792 (r) 2 55.928 55.92839019 () Calculate x and y when r = 25 and = 13.979 13.97982259 (x) 2 20.725 20.72593931 (y) Operation !m(SET UP)cccccc 1(Deg)J K6(g)5(ANGL)6(g)1(Pol() 14,20.7)wJ 2(Rec()25,56)w
2-4-10 Function Calculations
k Permutation and Combination
u Permutation n! nPr = (n r)! u Combination n! nCr = r! (n r)!
Be sure to specify Comp for Mode in the Setup screen.
To calculate the possible number of different arrangements using 4 items selected from among 10 items Operation 10K6(g)3(PROB)2(nPr)4w

Formula

P4 = 5040
To calculate the possible number of different combinations of 4 items that can be selected from among 10 items Operation 10K6(g)3(PROB)3(nCr)4w

C4 = 210

k Fractions
How you should input fractions depends on the input mode that is currently selected.
Improper Fraction Math input mode

Mixed Fraction

($7c3)

(1$(()2e1c3)

Linear input mode

Numerator Denominator

Integer Part Numerator Denominator

(2$1$3)

For information about the Math input mode, see Input Operations in the Math Input Mode on page 1-3-8. Fraction calculation results are always reduced before being displayed.
2-4-11 Function Calculations
Be sure to specify Comp for Mode in the Setup screen. Example 73 + 3 = 20 Operation <Math> $2c5e+!$(&)3e1c4 w <Line> 2$5+3$1$4w + = 6.066202547 104*4572 <Math> $1c2578e+$1c4572w <Line> 1$2578+1$4572w 1 0.5 = 0.25*<Math> $1c2e*.5w <Line> 1$2*.5w 1.5 + 2.3i = + i = 7 + Display: 3{2 +23{10i 1.5+2.3!a(i)w MM*3 <Math> $1c$1c3e+$1c4w <Line> 1$(1$3+1$4)w
*1 When the total number of characters, including integer, numerator, denominator and delimiter marks exceeds 10, the fraction is automatically displayed in decimal format. *2 Calculations containing both fractions and decimals are calculated in decimal format.
*3 Pressing M once when converting the decimal part of a complex number to a fraction first displays the real part and imaginary part on separate lines.

*1 The function type can be changed for rectangular coordinate functions and inequalities only.
# Parametric functions come in pairs (Xt and Yt).

5-3-8 Drawing a Graph

kSelecting Functions for Graphing
uTo specify the draw/non-draw status of a graph
1.On the graph relation list, use f and c to highlight the relation you do not want to graph. 2.Press 1(SEL). Each press of 1(SEL) toggles graphing on and off. 3.Press 6(DRAW). Example To select the following functions for drawing : Y1 = 2x2 5, r2 = 5 sin3 Use the following V-Window settings. Xmin = 5, Ymin = 5, Xmax = 5, Ymax = 5, Xscale = 1 Yscale = 1
T min = 0, T max = , T ptch = 2 / 60 cf (Select a memory area that contains a function for which you want to specify non-draw.) 1(SEL) (Specifies non-draw.) 6(DRAW) or w (Draws the graphs.)
You can use the Setup screen settings to alter the appearance of the graph screen as shown below. Grid: On (Axes: On Label: Off) This setting causes dots to appear at the grid intersects on the display.
Axes: Off (Label: Off Grid: Off) This setting clears the axis lines from the display.
Label: On (Axes: On Grid: Off)
This setting displays labels for the x- and y-axes.

5-3-9 Drawing a Graph

k Graph Memory
Graph memory lets you store up to 20 sets of graph function data and recall it later when you need it. A single save operation saves the following data in graph memory. All graph functions in the currently displayed Graph relation list (up to 20) Graph types Function graph line information Draw/non-draw status V-Window settings (1 set)
u To store graph functions in graph memory
1. Press 5(GMEM)1(STO) to display the pop-up window. 2. Press a number key to specify the Graph memory where you want to save the graph function, and then press w. Pressing bw stores the graph function to Graph Memory 1 (G-Mem1). There are 20 graph memories numbered G-Mem1 to G-Mem20.
u To recall a graph function
1. Press 5(GMEM)2(RCL) to display the pop-up window. 2. Press a number key to specify the Graph memory for the function you want to recall, and then press w. Pressing bw recalls the graph function in Graph Memory 1 (G-Mem1).
# Storing a function in a memory area that already contains a function replaces the existing function with the new one. # If the data exceeds the calculators remaining memory capacity, an error occurs.

n1.. size of sample 1 n2.. size of sample 2
# [Save Res] does not save the 1 condition in line 2.

6-5-7 Tests

u 1-Prop Z Test
This test is used to test for an unknown proportion of successes. The 1-Prop Z Test is applied to the normal distribution.

x n p0 Z= p0 (1 p0) n

3(TEST) 1(Z) 3(1-P)
p0 : expected sample proportion n : size of sample
Perform the following key operations from the statistical data list.
Prop.. sample proportion test conditions (G p0 specifies two-tail test, < p0 specifies lower one-tail test, > p0 specifies upper one-tail test.)
p0.. expected sample proportion (0 < p0 < 1) x.. sample value (x > 0 integer) n.. size of sample (positive integer)
Save Res.. list for storage of calculation results (None or List 1 to 26) Execute.. executes a calculation or draws a graph After setting all the parameters, use c to move the highlighting to Execute and then press one of the function keys shown below to perform the calculation or draw the graph. 1(CALC). Performs the calculation. 6(DRAW). Draws the graph. Calculation Result Output Example
PropG0.5.. direction of test
z.. z score p.. p-value p.. estimated sample proportion n.. size of sample
# [Save Res] does not save the Prop condition in line 2.

6-5-8 Tests

u 2-Prop Z Test
This test is used to compare the proportion of successes. The 2-Prop Z Test is applied to the normal distribution.
x1 x2 n1 n2 p(1 p ) 1 + 1 n1 n2
x1 : data value of sample 1 x2 : data value of sample 2 n1 : size of sample 1 n2 : size of sample 2 : estimated sample proportion p
Perform the following key operation from the statistical data list. 3(TEST) 1(Z) 4(2-P)
p1.. sample proportion test conditions (G p2 specifies two-tail test, < p2 specifies one-tail test where sample 1 is smaller than sample 2, > p2 specifies one-tail test where sample 1
is greater than sample 2.)

7-2-1 Simple Interest

7-2 Simple Interest
This calculator uses the following formulas to calculate simple interest.

u Formula

365-day Mode 360-day Mode
SI' = n PV i 365 SI' = n PV i 360

I% 100 I% i= 100 i=

: interest : number of interest periods PV : principal I% : annual interest SFV : principal plus interest
SI = SI' SFV = (PV + SI')
Press 1(SMPL) from the Financial 1 screen to display the following input screen for simple interest. 1(SMPL)
n.. number of interest periods (days) I%. annual interest rate PV. principal
After configuring the parameters, use one of the function menus noted below to perform the corresponding calculation. {SI} {simple interest} {SFV} {simple future value}
An error (Ma ERROR) occurs if parameters are not configured correctly.

7-2-2 Simple Interest

Use the following function menus to maneuver between calculation result screens. {REPT} {parameter input screen} {GRPH} {draws graph}
After drawing a graph, you can press !1(TRCE) to turn on trace and read calculation results along the graph. Each press of e while trace is turned on cycles the displayed value in the sequence: present value (PV) simple interest (SI) simple future value (SFV). Pressing d cycles in the reverse direction.
Press J to return to the parameter input screen.

7-3-1 Compound Interest

7-3 Compound Interest
This calculator uses the following standard formulas to calculate compound interest.

u Formula I

PV+PMT
(1 + i S)[(1 + i)n1] i(1 + i)

1 (1 + i)

I% 100

PV= (PMT + FV )

PMT + PV

PV + FV

PV : present value FV : future value PMT : payment n : number of compound periods I% : annual interest rate i is calculated using Newtons Method.

log n=

(1 + i S ) PMTFVi (1 + i S ) PMT+PVi log(1 + i)
S = 0 assumed for end of term S = 1 assumed for beginning of term
(1 + i S)[(1 + i)n1] i(1 + i)n

1 (1+ i)n

Parameters: left side/right side: variable (A to Z, r, ), numeric constant, variable expression (such as: A 2) relational operator: =, , >, <, ,

k Other

RclCapt
Function: Displayed the contents specified by the capture memory number. Syntax: RclCapt <capture memory number>. (capture memory number: 1 to 20)
8-6-1 Using Calculator Functions in Programs
8-6 Using Calculator Functions in Programs

k Text Display

You can include text in a program by simply enclosing it between double quotation marks. Such text appears on the display during program execution, which means you can add labels to input prompts and results. Program CASIO ?X X = ? X Display CASIO ? X=?
If the text is followed by a calculation formula, be sure to insert a display command (^) between the text and calculation. Inputting more than 21 characters causes the text to move down to the next line. The screen scrolls automatically if the text exceeds 21 characters. You can specify up to 255 bytes of text for a comment.
k Using Matrix Row Operations in a Program
These commands let you manipulate the rows of a matrix in a program. For this program, enter the RUN MAT mode and then use the Matrix Editor to input the matrix, and then enter the PRGM mode to input the program.
u To swap the contents of two rows (Swap)
To swap the values of Row 2 and Row 3 in the following matrix: Matrix A = 4 6
The following is the syntax to use for this program. Swap A, 2, 3_

Rows to be swapped

Executing this program produces the following result.
8-6-2 Using Calculator Functions in Programs
u To calculate a scalar multiplication (`Row) `
To calculate the product of Row 2 of the matrix in Example 1 and the scalar 4
The following is the syntax to use for this program. `Row 4, A, 2_ Row Matrix name Multiplier
u To calculate a scalar multiplication and add the results to another row ` (`Row+)
Example 3 To calculate the product of Row 2 of the matrix in Example 1 and the scalar 4, then add the result to row 3
The following is the syntax to use for this program. `Row+ 4, A, 2, 3_ Rows to be added Row for which scalar multiplication is to be calculated. Matrix name Multiplier
8-6-3 Using Calculator Functions in Programs

u To add two rows (Row+)

To add Row 2 to Row 3 of the matrix in Example 1
The following is the syntax to use for this program. Row+ A, 2, 3_
the row number to be added to the row number to be added Matrix name
k Using Graph Functions in a Program

5, 10, 15,. Arithmetic sequence 5, 10, 20,. Geometric sequence

8-8-4 Program Library

8-8-5 Program Library

Ellipse

This program displays a number table of the following values based on input of the foci of an ellipse, the sum of the distance between the loci and foci, and the pitch (step size) of X. Y1: Coordinate values of upper half of ellipse Y2: Coordinate values of lower half of ellipse Y3: Distances between right focus and loci Y4: Distances between left focus and loci Y5: Sum of Y3 and Y4 Next, the program plots the foci and values in Y1 and Y2. Purpose This program shows that the sums of the distances between the loci and two foci of an ellipse are equal.

8-8-6 Program Library

8-8-7 Program Library

Rotation

Description This program draws an angle at the coordinate defined by an input vertex, and then rotates it to a specified angle around the vertex. Purpose This program demonstrates coordinate transformation using a matrix. Important! Deg must be set as the angle unit for this program.

8-8-8 Program Library

wfcde.

8-8-9 Program Library

Interior Angles and Surface Area of a Triangle
This program calculates the interior angles and surface area of a triangle defined by input coordinates for angles A, B, and C. Purpose This program calculates the interior angles and surface area of a triangle defined by coordinates for angles A, B, and C. Important! Inputting the same coordinates for any two angles (A, B, C) causes an error.

8-8-10 Program Library

The Spreadsheet application provides you with powerful, takealong-anywhere spreadsheet capabilities. 9-1 9-2 9-3 9-4 9-5 9-6 9-7 9-8 Spreadsheet Overview File Operations and Re-calculation Basic Spreadsheet Screen Operations Inputting and Editing Cell Data S SHT Mode Commands Statistical Graphs Using the CALC Function Using Memory in the S SHT Mode
9-1-1 Spreadsheet Overview

9-1 Spreadsheet Overview

This section describes the Spreadsheet application screen, and provides basic information about its menus and commands.

k Using the S SHT Mode

9-4-6 Inputting and Editing Cell Data
k Referencing a Particular Cell
The following procedure shows how to reference A1 (which contains the value 3) and perform the calculation A1 2.
u To reference a particular cell
1. Move the cell cursor to cell A2, and then input !.(=).
2. Press 1(GRAB). This enters the Grab mode, which changes the function menu to the function described below. The Grab mode function menu makes it easier to move the cursor around the spreadsheet. To move the cell cursor to here: A specific cell Line 1 of current column Column A of current line Bottom line of current column Column Z of current line 3. Press f to move the cell cursor to cell A1. 4. Press 1(SET). This inputs the reference to cell A1. Press this key: 2(GO) 3(TOP) 4(TOP) 5(BOT) 6(BOT)
# Instead of using the GRAB command (1(GRAB) in step 2), you could also type in the necessary letter and number manually, if you want. In place of steps 2 through 4 in the
above procedure, you could input av(A)b to type A1 if you want. For more information, see Formula Input Example (page 9-4-4).
9-4-7 Inputting and Editing Cell Data
5. Next, input *c. 6. Press w to store the formula.

Result of A1 2

k Referencing a Range of Cells
You can reference a range of cells to obtain their sum, mean, etc. The following procedure input a formula to determine the sum of cells A6 through B7, and inputs the result in cell A4. This procedure assumes that cells A6 through B7 already contain the values shown below.
u To reference a range of cells
1. Move the cell cursor to cell A4, and then input !.(=). 2. Perform the following key operation to input the sum command. 5(CEL)5(Sum)
CellSum( is a S SHT mode command. See 9-5 S SHT Mode Commands for more information. 3. Press J1(GRAB). This enters the Grab mode. 4. Use the cursor keys to move the cell cursor to the first cell of the range you want to select (A6 in this example).
9-4-8 Inputting and Editing Cell Data
5. Press !i(CLIP). This will cause the cell cursor to change from highlighting to a thick-line boundary.

Warning! Never perform this operation unless you want to totally clear the memory of the calculator. If you need the data currently stored in memory, be sure to write it down somewhere before performing the P button operation. Pressing the P button while a calculation operation is being performed (while the calculator is performing a calculation internally) deletes all data in memory. You can also reset the calculator using front panel key operations (see 11-4 Reset). Use the P button to reset only while the front panel keys are disabled for some reason.

-6-1 Power Supply

6 Power Supply
This calculator is powered by four AAA-size (LR03 (AM4)) batteries. In addition, it uses a single CR2032 lithium battery as a back up power supply for the memory. If the following message appears on the display, immediately turn off the calculator and replace main batteries as instructed.
If you try to continue using the calculator, it will automatically turn off in order to protect memory contents. You will not be able to turn power back on until you replace batteries. Be sure to replace the main batteries at least once every one year, no matter how much you use the calculator during that time. The batteries that come with this calculator discharge slightly during shipment and storage. Because of this, they may require replacement sooner than the normal expected battery life. Warning! Main memory contents will be deleted if you remove both the main power supply and the memory back up batteries at the same time. If you ever remove both batteries, correctly reload them and then perform the reset operation.

-6-2 Power Supply

k Replacing Batteries
Precautions: Incorrectly using batteries can cause them to burst or leak, possibly damaging the interior of the calculator. Note the following precautions: Be sure that the positive (+) and negative () poles of each battery are facing in the proper directions. Never mix batteries of different types. Never mix old batteries and new ones. Never leave dead batteries in the battery compartment. Remove the batteries if you do not plan to use the calculator for long periods.