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.
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.
• 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.
• 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.
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.
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. •...
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.
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.
(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.
• 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.
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.
• 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.
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.
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. •...
• 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.
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) •...
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.
• 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 •...
• 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) •...
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...
• 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.
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.
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...
• 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...
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...
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.
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.) •...
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...
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.
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.
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.
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.
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.
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