Casio fx-100AU PLUS User manual

fx-100AU
User's Guide
Ehttp://world.casio.com/edu_e/

– 1 –
Removing and Replacing
the Calculator’s Cover
•Before starting .....1
Holding the cover as shown in the illustration, slide the
unit out of the cover.
•After you are finished .....2
Holding the cover as shown in the illustration, slide the
unit out of the cover.
•Always slide the keyboard end of the unit into the cover
first. Never slide the display end of the unit into the cover.
.....1
.....2

– 2 –
Safety Precautions
Be sure to read the following safety precautions before
using this calculator. Keep this manual handy for later ref-
erence.
Caution
This symbol is used to indicate information that can
result in personal injury or material damage if ignored.
Batteries
•After removing the battery from the calculator, put it
in a safe place where it will not get into the hands of
small children and accidentally swallowed.
•Keep batteries out of the reach of small children. If
accidentally swallowed, consult with a physician im-
mediately.
•Never charge batteries, try to take batteries apart, or
allow batteries to become shorted. Never expose
batteries to direct heat or dispose of them by incin-
eration.
•Misuse of batteries can cause them to leak and dam-
age nearby items, and can create the risk of fire and
personal injury.
•Always make sure that the battery’s positive kand
negative lends are facing correctly when you load
it into the calculator.
•Remove the battery if you do not plan to use the
calculator for a long time.
•Use only the type of battery specified for this calcu-
lator in this manual.
Disposing of the Calculator
•Never dispose of the calculator by burning it. Doing
so can cause certain components to suddenly burst,
creating the risk of fire and personal injury.

– 3 –
•The displays and illustrations (such as key markings)
shown in this User’s Guide are for illustrative purposes
only, and may differ somewhat from the actual items they
represent.
•The contents of this manual are subject to change with-
out notice.
•In no event shall CASIO Computer Co., Ltd. be liable to
anyone for special, collateral, incidental, or consequential
damages in connection with or arising out of the purchase
or use of these materials. Moreover, CASIO Computer
Co., Ltd. shall not be liable for any claim of any kind
whatsoever against the use of these materials by any
other party.
Handling Precautions
•Be sure to press the 5key before using the calcu-
lator for the first time.
•Even if the calculator is operating normally, replace
the battery at least once every two years.
A dead battery can leak, causing damage to and mal-
function of the calculator. Never leave a dead battery in
the calculator.
•The battery that comes with this unit discharges
slightly during shipment and storage. Because of
this, it may require replacement sooner than the
normal expected battery life.
•Low battery power can cause memory contents to
become corrupted or lost completely. Always keep
written records of all important data.
•Avoid use and storage in areas subjected to tem-
perature extremes.
Very low temperatures can cause slow display response,
total failure of the display, and shortening of battery life.
Also avoid leaving the calculator in direct sunlight, near
a window, near a heater or anywhere else it might be
exposed to very high temperatures. Heat can cause dis-
coloration or deformation of the calculator’s case, and
damage to internal circuitry.

– 4 –
•Avoid use and storage in areas subjected to large
amounts of humidity and dust.
Take care never to leave the calculator where it might
be splashed by water or exposed to large amounts of
humidity or dust. Such conditions can damage internal
circuitry.
•Never drop the calculator or otherwise subject it to
strong impact.
•Never twist or bend the calculator.
Avoid carrying the calculator in the pocket of your trou-
sers or other tight-fitting clothing where it might be sub-
jected to twisting or bending.
•Never try to take the calculator apart.
•Never press the keys of the calculator with a ball-
point pen or other pointed object.
•Use a soft, dry cloth to clean the exterior of the cal-
culator.
If the calculator becomes very dirty, wipe it off with a
cloth moistened in a weak solution of water and a mild
neutral household detergent. Wring out all excess mois-
ture before wiping the calculator. Never use thinner, ben-
zene or other volatile agents to clean the calculator. Do-
ing so can remove printed markings and can damage
the case.

– 5 –
Contents
Removing and Replacing the
Calculator’s Cover .................................. 1
Safety Precautions .................................. 2
Handling Precautions ............................. 3
Two-line Display ...................................... 7
Before getting started... .......................... 7
kModes .................................................................... 7
kInput Capacity ........................................................ 8
kMaking Corrections During Input ........................... 9
kReplay Function ..................................................... 9
kError Locator .......................................................... 9
kMulti-statements .................................................... 9
kExponential Display Formats ............................... 10
kDecimal Point and Separator Symbols ................ 10
kInitializing the Calculator ...................................... 11
Basic Calculations ................................ 11
kArithmetic Calculations ........................................ 11
kFraction Operations ............................................. 12
kPercentage Calculations ...................................... 13
kDegrees, Minutes, Seconds Calculations ............ 14
kFIX, SCI, RND ..................................................... 15
Memory Calculations ............................ 16
kAnswer Memory ................................................... 16
kConsecutive Calculations .................................... 16
kIndependent Memory ........................................... 16
kVariables .............................................................. 17
Scientific Function Calculations.......... 17
kTrigonometric/Inverse Trigonometric Functions ... 18
kHyperbolic/Inverse Hyperbolic Functions ............ 18
kCommon and Natural Logarithms/
Antilogarithms ...................................................... 19

– 6 –
kSquare Roots, Cube Roots, Roots, Squares,
Cubes, Reciprocals, Factorials, Random Numbers,
π , and Permutation/Combination ......................... 19
kAngle Unit Conversion ......................................... 20
kCoordinate Conversion (Pol (x, y), Rec (r,
␪ )) ..... 20
kEngineering Notation Calculations ....................... 21
kInputting Engineering Symbols ............................ 21
Statistical Calculations ......................... 23
Standard Deviation .................................................. 23
Normal Distribution .................................................. 25
Regression Calculations .......................................... 26
Complex Number Calculations ............ 30
kAbsolute Value and Argument Calculation ........... 31
kRectangular Form ↔Polar Form Display ............ 31
kConjugate of a Complex Number ......................... 32
Base-nCalculations .............................. 32
Technical Information ........................... 34
kWhen you have a problem...... ............................. 34
kError Messages ................................................... 35
kOrder of Operations ............................................. 36
kStacks .................................................................. 37
kInput Ranges ....................................................... 38
Power Supply ........................................ 40
Specifications ........................................ 41

– 7 –
Two-line Display
The two-line display makes it possible to view
both the calculation formula and its result at
the same time.
•The upper line shows the calculation formula.
•The lower line shows the result.
A separator symbol is displayed every three digits when
the integer part of the mantissa has more than three dig-
its.
Before getting started...
kModes
Before starting a calculation, you must first enter the correct
mode as indicated in the table below.
To perform this type of Perform this To enter
calculation: key operation: this mode:
Basic arithmetic F1COMP
calculations
Complex number F2CMPLX
calculations
Standard deviation FF1SD
Regression calculations FF2REG
Base-ncalculations FF3BASE
• Pressing the Fkey more than twice displays additional
setup screens. Setup screens are described where they
are actually used to change the calculator setup.

– 8 –
• In this manual, the name of the mode you need to enter
in order to perform the calculations being described is
indicated in the main title of each section.
Example:
Note!
• To return the calculation mode and setup to the initial
defaults shown below, press AB2(Mode) =.
Calculation Mode: COMP
Angle Unit: Deg
Exponential Display Format: Norm 1, Eng OFF
Complex Number Display Format: a+bi
Fraction Display Format: ab/c
Decimal Point Character: Dot
•Mode indicators appear in the upper part of the display,
except for the BASE indicators, which appear in the
exponent part of the display.
•Engineering symbols are automatically turned off while
the calculator is the BASE Mode.
•You cannot make changes to the angle unit or other
display format (Disp) settings while the calculator is in
the BASE Mode.
•The COMP, CMPLX, SD, and REG modes can be used
in combination with the angle unit settings.
•Be sure to check the current calculation mode (SD, REG,
COMP, CMPLX) and angle unit setting (Deg, Rad, Gra)
before beginning a calculation.
kInput Capacity
•The memory area used for calculation input can hold 79
“steps.” One step is taken up each time you press a
number key or arithmetic operator key ( +, ,, -, \).
A Aor pkey operation does not take up a step, so
inputting AD, for example, takes up only one step.
•You can input up to 79 steps for a single calculation.
Whenever you input the 73rd step of any calculation,
the cursor changes from “_” to “k” to let you know
memory is running low. If you need to input more than
79 steps, you should divide your calculation into two or
more parts.
CMPLX
Complex Number
Calculations

– 9 –
•Pressing the gkey recalls the last result obtained, which
you can use in a subsequent calculation. See “Answer
Memory” for more information about using the gkey.
kMaking Corrections During Input
• Use eand rto move the cursor to the location you
want.
• Press [to delete the number or function at the current
cursor position.
• Press AKto change to an insert cursor t. Inputting
something while the insert cursor is on the display in-
serts the input at the insert cursor position.
•Pressing AK, or =returns to the normal cursor from
the insert cursor.
kReplay Function
• Pressing eor rrecalls the last calculation you per-
formed. You can then make any changes you want in
the calculation and re-execute it.
• Pressing tdoes not clear replay memory, so you can
recall the last calculation even after you press t.
•Replay memory is cleared by any of the following ac-
tions.
When you press the 5key
When you initialize modes and settings by pressing A
B2(or 3) =
When you change from one calculation mode to another
When you turn off the calculator.
kError Locator
• Pressing ror eafter an error occurs displays the
calculation with the cursor positioned at the location
where the error occurred.
kMulti-statements
A multi-statement is an expression that is made up of two
or more smaller expressions, which are joined using a colon
( : ).