1 Fx-95 MSfx-100 MSfx- 115ms ( fx- 912ms )fx-570 MSfx-991 MSUser's Guidekfx- 912ms ownersPlease be sure to read the important notice of this ELECTRONICS CO., LTD. Unit 6, 1000 North Circular Road, London NW2 7JD, and Replacingthe Calculator s Cover Before starting ..1 Holding the cover as shown in the illustration, slide theunit out of the cover. After you are finished ..2 Holding the cover as shown in the illustration, slide theunit out of the cover. Always slide the keyboard end of the unit into the coverfirst. Never slide the display end of the unit into the symbol is used to indicate information that canresult in personal injury or material damage if After removing the battery from the calculator, put itin a safe place where it will not get into the hands ofsmall children and accidentally swallowed.
2 Keep batteries out of the reach of small children. Ifaccidentally swallowed, consult with a physician im-mediately. Never charge batteries, try to take batteries apart, orallow batteries to become shorted. Never exposebatteries 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 andpersonal injury. Always make sure that the battery s positive k andnegative l ends are facing correctly when you loadit into the calculator. Remove the battery if you do not plan to use thecalculator for a long time (fx- 95ms /100MS/ 570ms ). Use only the type of battery specified for this calcu-lator in this of the Calculator Never dispose of the calculator by burning it.
3 Doingso can cause certain components to suddenly burst,creating the risk of fire and personal injury. The displays and illustrations (such as key markings)shown in this User s Guide are for illustrative purposesSafety PrecautionsBe sure to read the following safety precautions beforeusing this calculator. Keep this manual handy for later , and may differ somewhat from the actual items theyrepresent. The contents of this manual are subject to change with-out notice. In no event shall CASIO Computer Co., Ltd. be liable toanyone for special, collateral, incidental, or consequentialdamages in connection with or arising out of the purchaseor use of these materials. Moreover, CASIO ComputerCo., Ltd.
4 Shall not be liable for any claim of any kindwhatsoever against the use of these materials by anyother party. Be sure to press the 5 key before using the calcu-lator for the first time. Even if the calculator is operating normally, replacethe battery at least once every three years for the fx- 115ms /fx- 570ms / fx-991MS , or at least once every twoyears for the fx-95 dead battery can leak, causing damage to and mal-function of the calculator. Never leave a dead battery inthe calculator. The battery that comes with this unit dischargesslightly during shipment and storage. Because ofthis, it may require replacement sooner than thenormal expected battery life. Low battery power can cause memory contents tobecome corrupted or lost completely.
5 Always keepwritten records of all important data. Avoid use and storage in areas subjected to tem-perature low temperatures can cause slow display response,total failure of the display, and shortening of battery avoid leaving the calculator in direct sunlight, neara window, near a heater or anywhere else it might beexposed to very high temperatures. Heat can cause dis-coloration or deformation of the calculator s case, anddamage to internal Precautions4 Avoid use and storage in areas subjected to largeamounts of humidity and care never to leave the calculator where it might besplashed by water or exposed to large amounts of hu-midity or dust. Such conditions can damage internal cir-cuitry.
6 Never drop the calculator or otherwise subject it tostrong impact. Never twist or bend the 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 the calculator becomes very dirty, wipe it off with acloth moistened in a weak solution of water and a mildneutral 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 damagethe and Replacing theCalculator s Cover.
7 1 Safety Precautions .. 2 Handling Precautions .. 3 Two-line Display .. 7 Before getting .. 7kModes .. 7kInput Capacity .. 8kMaking Corrections During Input .. 9kReplay Function .. 9kError Locator .. 9kMulti-statements .. 10kExponential Display Formats .. 10kDecimal Point and Separator Symbols .. 11kInitializing the Calculator .. 11 Basic Calculations .. 11kArithmetic Calculations .. 11kFraction Operations .. 12kPercentage Calculations .. 14kDegrees, Minutes, Seconds Calculations .. 15kFIX, SCI, RND .. 15 Memory Calculations .. 16kAnswer Memory .. 16kConsecutive Calculations .. 17kIndependent Memory .. 17kVariables .. 17 Scientific Function Calculations .. 18kTrigonometric/Inverse Trigonometric Functions.
8 18kHyperbolic/Inverse Hyperbolic Functions .. 196kCommon and Natural Logarithms/Antilogarithms .. 19kSquare Roots, Cube Roots, Roots, Squares, Cubes,Reciprocals, Factorials, Random Numbers, , andPermutation/Combination .. 20kAngle Unit Conversion .. 21kCoordinate Conversion (Pol (x, y), Rec (r, )) .. 21kEngineering Notation Calculations .. 22 Equation Calculations .. 22kQuadratic and Cubic Equations .. 22kSimultaneous Equations .. 24 Statistical Calculations .. 26 Standard Deviation .. 26 Regression Calculations .. 28 Technical Information .. 32kWhen you have a .. 32kError Messages .. 32kOrder of Operations .. 34kStacks .. 35kInput Ranges .. 36 Power Supply (fx- 95ms only).. 38 Specifications (fx- 95ms only).
9 397 Two-line DisplayThe two-line display makes it possible to viewboth the calculation formula and its result atthe same time. The upper line shows the calculation formula. The lower line shows the separator symbol is displayed every three digits whenthe integer part of the mantissa has more than three getting starting a calculation, you must first enter the cor-rect mode as indicated in the table below. The following table shows the modes and requiredoperations for the fx- 95ms only. Users of other mod-els should refer to the User s Guide 2 (AdditionalFunctions) for information about modes and ModesTo perform this type ofPerform thisTo entercalculation:key operation: this mode:Basic arithmetic calculationsF 1 COMPS tandard deviationF 2 SDRegression calculationsF 3 REGS olution of equationsF F 1 EQN8 Pressing the F key more than twice displays additionalsetup screens.
10 Setup screens are described in the sec-tions of this manual where they are actually used tochange the calculator setup. In this manual, the name of the mode you need to enterin order to perform the calculations being described isindicated in the main title of each :Note! To return the calculation mode and setup to the initialdefaults shown below, press A B 2(Mode) =.Calculation Mode:COMPA ngle Unit:DegExponential Display Format: Norm 1 Fraction Display Format:ab/cDecimal Point Character:Dot Mode indicators appear in the upper part of the display. Be sure to check the current calculation mode (SD, REG,COMP) and angle unit setting (Deg, Rad, Gra) beforebeginning a Capacity The memory area used for calculation input can hold 79 steps.