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Casio fx-270MS User Manual

Casio fx-270MS User Manual

Casio calculator user's guide fx-82ms, fx-83ms, fx-85ms, fx-270ms, fx-300ms, fx-350ms


User's Guide


Table of Contents

Summary of Contents for Casio fx-270MS

  • Page 1 User's Guide
  • Page 2 CASIO ELECTRONICS CO., LTD. Unit 6, 1000 North Circular Road, London NW2 7JD, U.K.
  • Page 3: Removing And Replacing The Calculator's Cover

    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.
  • Page 4: Safety Precautions

    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.
  • Page 5: Handling Precautions

    • 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.
  • Page 6 • 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.
  • Page 7: Table Of Contents

    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 ... 11 kPercentage Calculations ... 13 kDegrees, Minutes, Seconds Calculations ...
  • Page 8 kCommon and Natural Logarithms/ Antilogarithms ... 19 kSquare Roots, Cube Roots, Roots, Squares, Cubes, Reciprocals, Factorials, Random Numbers, π , and Permutation/Combination ... 19 kAngle Unit Conversion ... 20 kCoordinate Conversion (Pol ( kEngineering Notation Calculations ... 21 Statistical Calculations ... 21 Standard Deviation ...
  • Page 9: Two-Line Display

    Setup screens are described in the sec- tions of this manual where they are actually used to change the calculator setup. • 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.
  • Page 10: Kinput Capacity

    Note! • To return the calculation mode and setup to the initial defaults shown below, press Calculation Mode: Angle Unit: Exponential Display Format: Norm 1 Fraction Display Format: Decimal Point Character: • Mode indicators appear in the upper part of the display. •...
  • Page 11: Kreplay Function

    When you press the When you initialize modes and settings by pressing When you change from one calculation mode to another When you turn off the calculator. k Error Locator • Pressing calculation with the cursor positioned at the location where the error occurred.
  • Page 12: Kexponential Display Formats

    Exponential Display Formats This calculator can display up to 10 digits. Larger values are automatically displayed using exponential notation. In the case of decimal values, you can select between two formats that determine at what point exponential notation is used.
  • Page 13: Kinitializing The Calculator

    (Dot): (Comma): Comma decimal point, period separator k Initializing the Calculator • Perform the following key operation when you want to initialize the calculation mode and setup, and clear re- play memory and variables.
  • Page 14 • Example 1: • Example 2: 3 • Example 3: • Example 4: • Results of calculations that mix fraction and decimal val- ues are always decimal. uDecimal ↔ Fraction Conversion • Use the operation shown below to convert calculation results between decimal values and fraction values.
  • Page 15: Kpercentage Calculations

    uMixed Fraction ↔ Improper Fraction Conversion • Example: 1 • You can use the display setup (Disp) screen to specify the display format when a fraction calculation result is greater than one. • To change the fraction display format, press the a number of times until you reach the setup screen shown below.
  • Page 16: Kdegrees, Minutes, Seconds Calculations

    • Example 5: To discount the sum of 168, 98, and 734 by * As shown here, if you want to use the current Answer Memory value in a mark up or discount calculation, you need to assign the Answer Memory value into a variable and then use the variable in the mark up/discount calculation.
  • Page 17: Kfix, Sci, Rnd

    k FIX, SCI, RND • To change the settings for the number of decimal places, the number of significant digits, or the exponential dis- play format, press the you reach the setup screen shown below. • Press the number key ( to the setup item you want to change.
  • Page 18: Memory Calculations

    Memory Calculations Use the key to enter the COMP Mode when you want to perform a calculation using memory. COMP ... k Answer Memory • Whenever you press pression, the calculated result automatically updates Answer Memory contents by storing the result. •...
  • Page 19: Kvariables

    • Example: ) 45 (Total) –11 k Variables • There are nine variables (A through F, M, X and Y), which can be used to store data, constants, results, and other values. • Use the following operation to delete data assigned to a particular variable: letes the data assigned to variable A.
  • Page 20: Ktrigonometric/Inverse Trigonometric Functions

    k Trigonometric/Inverse Trigonometric Functions • To change the default angle unit (degrees, radians, grads), press the reach the angle unit setup screen shown below. • Press the number key ( to the angle unit you want to use. π (90° = radians = 100 grads) •...
  • Page 21: Kcommon And Natural Logarithms/Antilogarithms

    k Common and Natural Logarithms/ Antilogarithms • Example 1: log 1.23 • Example 2: In 90 (= log ln e • Example 3: e • Example 4: 10 • Example 5: 2 • Example 6: ( 2) • Negative values inside of calculations must be enclosed within parentheses.
  • Page 22: Kangle Unit Conversion

    • Example 8: To generate a random number between 0.000 and 0.999 (The above value is a sample only. Results differ each time.) • Example 9: 3π • Example 10: To determine how many different 4-digit values can be produced using the numbers 1 through 7 •...
  • Page 23: Kengineering Notation Calculations

    • Example 2: To convert rectangular coordinates (1, 3) to polar coordinates (r, ) (Rad) θ 1.047197551 • Press play the value of . k Engineering Notation Calculations • Example 1: To convert 56,088 meters to kilometers → 56.088 (km) •...
  • Page 24 To recall this type of value: Σx Σx σ σ • Example: To calculate the following data : 55, 54, 51, 55, 53, 53, 54, 52 In the SD Mode: A B 1 (Scl) Sample Standard Deviation ( Population Standard Deviation ( ) = 53.375 Arithmetic Mean ( ) = 8...
  • Page 25 • You can then edit the displayed data, if you want. Input the new value and then press the old value with the new one. This also means that if you want to perform some other operation (calculation, recall of statistical calculation results, etc.), you should always press the key first to exit data display.
  • Page 26: Regression Calculations

    Regression Calculations Use the key to enter the REG Mode when you want to perform statistical calculations using regression. REG ... • In the SD Mode and REG Mode, the key. • Entering the REG Mode displays screens like the ones shown below.
  • Page 27: Linear Regression

    To recall this type of value: Σx Σx Σy Σy Σxy xσ xσ yσ yσ Regression coefficient A Regression coefficient B Regression calculation other than quadratic regression Correlation coefficient • The following table shows the key operations you should use to recall results in the case of quadratic regression. To recall this type of value: Σx Σx...
  • Page 28 • Example: Atmospheric Pressure vs. Temperature Atmospheric Temperature Pressure 10°C 1003 hPa 15°C 1005 hPa 20°C 1010 hPa 25°C 1011 hPa 30°C 1014 hPa In the REG Mode: (Lin) A B 1 (Scl) Regression Coefficient A = 997.4 Regression Coefficient B = 0.56 Correlation Coefficient Atmospheric Pressure at Temperature at 1000 hPa = 4.642857143...
  • Page 29: Quadratic Regression

    u Logarithmic, Exponential, Power, and Inverse Regression • Use the same key operations as linear regression to re- call results for these types of regression. • The following shows the regression formulas for each type of regression. Logarithmic Regression y Exponential Regression y Power Regression Inverse Regression...
  • Page 30: Technical Information

    Make sure you always keep written copies of all important data. k Error Messages The calculator is locked up while an error message is on the display. Press to display the calculation and correct the problem. See “Error Locator” for details.
  • Page 31 Math ERROR • Causes • Calculation result is outside the allowable calculation range. • An attempt to perform a function calculation using a value that exceeds the allowable input range. • An attempt to perform an illogical operation (division by zero, etc.) •...
  • Page 32: Korder Of Operations

    k Order of Operations Calculations are performed in the following order of prec- edence. 1 Coordinate transformation: Pol ( 2 Type A functions: With these functions, the value is entered and then the function key is pressed. !, ° ’ ” Angle unit conversions (DRG 3 Powers and roots: 5 Abbreviated multiplication format in front of...
  • Page 33: Kstacks

    Stacks This calculator uses memory areas, called “stacks,” to tem- porarily store values (numeric stack) and commands (com- mand stack) according to their precedence during calcu- lations. The numeric stack has 10 levels and the command stack has 24 levels. A stack error (Stack ERROR) occurs whenever you try to perform a calculation that is so com- plex that the capacity of a stack is exceeded.
  • Page 34: Kinput Ranges

    k Input Ranges Internal digits: 12 Accuracy*: As a rule, accuracy is ±1 at the 10th digit. Functions DEG 0 RAD 0 GRA 0 DEG 0 RAD 0 GRA 0 DEG Same as sin RAD Same as sin GRA Same as sin –1 –1 –1...
  • Page 35 Functions  1 10 Pol(x, y) , ) 0 Rec( θ: Same as sin °’ ” 1 10 Decimal ↔ Sexagesimal Conversions 0°0°0° Œ0: –1 10 0: However: –1 10 Œ0: –1 10 0: However: –1 10 Total of integer, numerator, and denominator must be 10 digits or less (including division marks).
  • Page 36: Power Supply

    Normally, calculators equipped with a solar cell alone can operate only when relatively bright light is present. The TWO WAY POWER system, however, lets you continue to use the calculator as long as there is enough light to read the display. • Replacing the Battery Either of the following symptoms indicates battery power is low, and that the battery should be replaced.
  • Page 37: Replacing The Battery

    This calculator is powered by single G13 Type (LR44) button battery. • Replacing the Battery Dim figures on the display of the calculator indicate that battery power is low. Continued use of the calculator when the battery is low can result in improper operation.
  • Page 38: Auto Power Off

    This calculator is powered by a single AA-size battery. • Replacing the Battery Dim figures on the display of the calculator indicate that battery power is low. Continued use of the calculator when the battery is low can result in improper operation.
  • Page 39: Specifications

    Specifications Power Supply: fx-82MS: Single AA-size battery (R6P (SUM-3)) fx-83MS/fx-270MS/fx-350MS: Single G13 Type button battery (LR44) fx-85MS/fx-300MS: Solar cell and a single G13 Type button battery (LR44) Battery Life: fx-82MS: Approximately 17,000 hours continuous display of flashing cursor. Approximately 2 years when left with power turned off.
  • Page 40 CASIO COMPUTER CO., LTD. 6-2, Hon-machi 1-chome Shibuya-ku, Tokyo 151-8543, Japan SA0311-C Printed in China CA 310120-001V03...

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