Casio EDWKBK55PLUS Calculator User Manual
Contents
1. 16 Replacing the Battery 17 S be gi NS varana sansa ana ana una 17 Frequently Asked Questions 17 Important Information e 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 e The contents of this manual are subject to change without notice e n 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 this product and items that come with it Moreover CASIO Computer Co Ltd shall not be liable for any claim of any kind whatsoever by any other party arising out of the use of this product and the items that come with it Be sure to keep all user documentation handy for future reference Sample Operations Sample operations in this manual are indicated by a L icon Unless specifically stated all sample operations assume that the calculator is in its initial default setup Use the procedure under Initializing the Calculator to return the calculator to its initial default setup For information about the MAJ and MEJ marks that are shown in the sample operations see Configuring the Calculator Se2. 4x3 25 145 EE 4 HE 2 5 14 5 4x3 7 1 4 9 Continuing Uz ba bu bu 7 1 EE 4 9 Ansvver Memory Ans The last calculation result obtained is stored in Ans ansvver memory Ans memory contents are updated whenever a new calculation result is displayed To divide the result of 3 x 4 by 30 MEJ me 22 Continuing 30 E 10 i agi sol 769 5 789 579 210 Continuing 789 ans Independent Memory M You can add calculation results to or subtract results from independent memory The M appears on the display when there is any value other than zero stored in independent memory L To clear the contents of M 0 0 24 To assign the result of 2 8 to M 2 8 10 L To add the result of 10 x 5 to M Continuing 10 X 5 50 L To subtract the result of 10 5 from M Continuing 10 H 5 W 15 L To recall the contents of M Continuing 45 Note You also can call M and use it in a calculation you are inputting Clearing the Contents of All Memories Ans memory and independent memory contents are retained even if you press ac or turn off the calculator Perform the following procedure when you want to clear the contents of all memories 2 Memory Yes Remainder Calculations You can use the R function in order to obtain the quotient and remainder in a division calculation L To calculate the quotient and remainder of 5 2 5 ER 2 5
3. Quotient Remainder Note Only the quotient value of a R calculation is stored in Ans memory e Assigning a remainder calculation result to independent memory M will cause only the quotient value to be assigned For example assigning the result of the remainder calculation 5 R2 5 ER 2 sTo M will result in 2 being assigned to M Adding a remainder calculation result to or subtracting result from M will add or subtract only the quotient value e Ifa R calculation is part of a multi step calculation only the quotient is passed on to the next operation Example 10 17 ER 6 10 2 Operation of the Fr and keys is disabled while a remainder division result is on the display E 11 Cases when Remainder Division becomes Non remainder Division If either of the following conditions exists when you perform a remainder division operation the calculation will be treated as normal non remainder division e When either the dividend or the divisor is a very large value Example 20000000000 17 Calculated as 20000000000 17 e When the quotient is not a positive integer or if the remainder is not a positive integer or positive fractional value Example 5 ER 2 Calculated as 5 2 Function Calculations For actual operations using each function see the Examples section following the list below Tt 7 is displayed as 3 141592654 but r 3 14159265358980 is used for internal calculation
4. 30 150 XX 20 22 5 30 L Calculate what percentage of 880 is 660 75 660 880 22 5 75 f Increase 2500 by 15 2875 2500 HE 2500 2 15 22 E 2875 Discount 3500 by 25 2625 3500 3500 DX 25 22 EZ 2625 Percent Conversion Calculation results can be converted to a percent VVhile a calculation result is displayed press Es 096 Percent display can be up to 10 digits long Pressing P again returns the calculation result to its original display format 1 2 3 300 1 EE 2 EZ Gar gt 300 zs 9 3 f 1 3 0 33 33 33 Fix 2 3 Fix 2 1 3 Es P 33 33 4 2 146 6666667 4 EZ 5 H2 3 gt 146 6666667 V2 141 4213562 C 0776 141 4213562 123 103 4166667 1 595 2 Es 3 b gt 103 4166667 e When the number of display digits is specified by Fix the value is converted to a percent and then adjusted to the specified number of digits The number of display digits setting is not applied to the value stored in Ans memory e When MathO is selected as the display format and the calculation result is a fraction root V or pi x the result is converted to a decimal fraction and then to a percent Pressing P again displays the decimal fraction value e When the calculation result is a sexagesimal value degrees minutes seconds it is converted to a decimal value and then to a percent e Percent conversion
5. Important Removing the battery will cause all of the calculator s memory contents to be deleted 1 Press Ac OFF to turn off the calculator e To ensure that you do not accidentally turn on power while replacing the battery slide the hard case onto the front of the calculator 2 Remove the cover as shown in the illustration and Screw replace the battery taking care that its plus and minus ends are facing correctly 3 Replace the cover 4 Initialize the calculator 3 All EZ Yes Do not skip the above step Specifications Power Requirements Built in solar cell button battery LR44 GPA76 x 1 Approximate Battery Life 3 years based on one hour of operation per day Operating Temperature 0 C to 40 C 32 F to 104 F Dimensions 11 1 H x 80 W x 162 D mm 3 3 H x 37 67 W x 6 s Approximate VVeight 95 g 3 4 oz including the battery Frequentiy Asked Questions E How can I perform display results the same way did on a model that does not have Natural Textbook Display Perform the following key operation 2 LineO See Configuring the Calculator Setup on page E 4 for more information E How can change a fraction form result to decimal form How can change a fraction form result produced by a division operation to decimal form See Toggling Calculation Results on page E 8 for the procedure M What is the difference between Ans memory and independe
6. 3 and Rnd 10 3 x3 MEJ SETUP 3 Fix 3 10 5 3 X 3 B 10 000 Ful 10 2 3 3 E 9 999 7 2 22 90 6 75 Z Simp 2 Manual 75 90 EE 907 Displayed when a fraction can be simplified 81 25 my F 3 751 30 Factor 341 E 13 Gimp F 9 ola ola Gimp When further simplification is not possible Simplified appears momentarily on the display and then the calculation result is displayed When a divisor of 3 is specified 7 18 2 21 EE Em 3 3 or 18 21 Gime 3 5 F 3 Calculation Ranges Number of Digits and Precision The calculation range number of digits used for internal calculation and calculation precision depend on the type of calculation you are performing Calculation Range and Precision Calculation Range 1 x 10 to 9 999999999 x 10 or Number of Digits for Internal 15 digits Calculation Precision In general 1 at the 10th digit for a single calculation Precision for exponential display is 1 at the least significant digit Errors are cumulative in the case of consecutive calculations Function Input Ranges and Precision Input Range 9 999999999 x 109 x 99 99999999 0 1x101 lt 1 x 1099 Ix lt lt 1x 10 x 0 x gt 0 1 x 1079 lt ylogx 100 x 0 y gt 0 x lt 0 y n 7 m n are integers n However 1 x 10199 lt ylog x 100 Total of integer numerator and denominator mus
7. calculation results and various indicators Indicators Input expression Calculation result 9 12 oo Ifa gt indicator appears on the right side of the input expression it means the displayed calculation continues to the right Use and to scroll the input expression display Display indicators This Means this indicator The keypad has been shifted by pressing the key The S keypad will unshift and this indicator will disappear when you press a key M There is a value stored in independent memory FIX A fixed number of decimal places is in effect Appears when natural calculation formula input using Math the same format as a formula is written is enabled Also appears when LineO is selected as the display format Calculation history memory data is available and can be VA replayed or there is more data above below the current screen Appears when Manual is selected for the Simp setting l on the setup menu and indicates that the fraction result of a calculation can be simplified Important For some type of calculation that takes a long time to execute the display may show only the above indicators without any value while it performs the calculation internally Configuring the Calculator Setup Press to display the setup menu Press the number key for the item you want to configure To close the setup menu without changing any setting press or SETUP Underline
8. cannot be performed on the result of a remainder calculation R Degree Minute Second Sexagesimal Calculations Performing an addition or subtraction operation between sexagesimal values or a multiplication or division operation between a sexagesimal value and a decimal value will cause the result to be displayed as a sexagesimal value You also can convert between sexagesimal and decimal The following E 9 is the input format for a sexagesimal value degrees minutes seconds Ps Note You must always input something for the degrees and minutes even if they are zero 4 2 20 30 397307 3 007007 2 Ev 20 k 30 zl R 39 30 6 9 3 0707 Convert 2215 18 to its decimal equivalent 2 B 15 9 18 E E 2715718 Converts sexagesimal to decimal 2 255 Converts decimal to sexagesimal 2215 187 Calculation History The calculator remembers up to approximately 200 bytes of data for the newest calculation You can scroll through calculation history contents using and L 141 2 1 EE 1 E 242 4 2 Ek 2 5 343 6 3 4 3 Scrolls back Scrolls back again NB EN Note Calculation history data is all cleared whenever you press on when you change the display format or whenever you perform any reset operation Replay While a calculation result is on the display you can press or to edit the expression you used for the previous calculation
9. operations in the above 4 sU 10 3 example 4 Q 30 HE 10 X 3 Note If the calculation becomes longer than the screen width during input the screen will scroll automatically to the right and the lt indicator will appear on the display When this happens you can scroll back to the left by using amp and to move the cursor Pressing while the cursor is at the end of the input calculation will cause it to jump to the beginning while pressing amp while the cursor is at the beginning will cause it to jump to the end You can input up to 99 bytes for a calculation Each numeral symbol or function normally uses one byte Some functions require three to 13 bytes The cursor will change shape to W when there are 10 bytes or less of allowed input remaining If this happens end calculation input and then press 5 Calculation Priority Sequence The priority sequence of input calculations is evaluated in accordance with the rules below When the priority of two expressions is the same the calculation is performed from left to right ist Parenthetical expressions 2nd Function with parentheses Rnd Ranint Functions that come after the input value x x powers arg square root Vm 4th Fractions Negative sign Note When squaring a negative value Such as 2 the value being squared must be enclosed in parentheses CQ 2 Since x has a higher priorit
10. Jx 55 PLUS User s Guide CASIO Worldwide Education Website http edu casio com CASIO EDUCATIONAL FORUM htto edu casio com forum CASIO Contents important information 88888888888888 88 2 Sample ayan ani ma adam n n 2 Initializing the Calculator 2 alely rEcCaullohSu 2 Handling Precautions 8888888888889388 2 Removing the Hard Case 3 Turning Power On and Off 3 Adjusting Display Contrast 3 Key Markings m 1m2u1n221 0212021 nn anna nan nn a 3 Reading the Display 460 4 Configuring the Calculator Setup 4 Inputting Expressions and Values 5 Toggling Calculation Results 8 Basic Calculatlons fm a nnan annn 8 Remainder Calculations 8 11 Function Calculations Ep amaaan amma 12 Calculation Ranges Number of Digits and Precision 14 gg gz A O 15 Before Assuming Malfunction of the Calculator
11. alculation and execute it again L When you input 14 0 x 2 by mistake instead of 14 10 x 2 Matho Math ERROR 14 0 X 2 CAC Cancel CaJC kJ Goto tor c 1 aig 15 10 14 5 Clearing the Error Message While an error message is displayed press to return to the calculation screen Note that this also clears the calculation that contained the error E 15 Error Messages Math ERROR Cause The intermediate or final result of the calculation you are performing exceeds the allowable calculation range Your input exceeds the allowable input range particularly when using functions The calculation you are performing contains an illegal mathematical operation such as division by zero Action Check the input values reduce the number of digits and try again e When using independent memory as the argument of a function make sure that the memory value is within the allowable range for the function Stack ERROR Cause The calculation you are performing has caused the capacity of the numeric stack or the command stack to be exceeded Action Simplify the calculation expression so it does not exceed the capacity of the stack Try splitting the calculation into two or more parts Syntax ERROR Cause There is a problem with the format of the calculation you are performing Action Make necessary corrections Argument ERROR Cause A non integer argument was input for the random nu
12. cloth to clean the exterior of the calculator e Whenever discarding the calculator or batteries be sure to do so in accordance with the laws and regulations in your particular area Company and product names used in this manual may be registered trademarks or trademarks of their respective owners Removing the Hard Case Before using the calculator slide its hard case downwards to remove it and then affix the hard case to the back of the calculator as shown in the illustration nearby Turning Power On and Off Press to turn on the calculator Press Ac OFF to turn off the calculator Auto Povver Off Your calculator will turn off automatically if you do not perform any operation for about 10 minutes If this happens press the key to turn the calculator back on Adjusting Display Contrast Display the CONTRAST screen by performing the following key operation SETUP 8 lt CONTP Next use and to adjust contrast After the setting is the way you want press Important If adjusting display contrast does not improve display readability it probably means that battery power is low Replace the battery Key Markings Pressing the key followed by a second key performs Alternate function the alternate function of the second key The alternate OFF function is indicated by the text printed above the key Keycap function E 3 Reading the Display The display of the calculator shows expressions you input
13. d settings are initial defaults 1 MathO 2 LineO Specifies the display format MathO displays input and calculation results using the same format as they are written on paper LineO displays input the same way as MathO but calculation results are displayed in decimal piay T PE x35 form T 545469226 Note In this manual the symbol next to a sample operation indicates MathO while the TEZ symbol indicates LineO E 4 3 Fix 4 Norm Specifies the number of digits for display of a calculation result Fix The value you specify from O to 9 controls the number of decimal places for displayed calculation results Calculation results are rounded off to the specified digit before being displayed Example IMEJ 100 7 14 286 Fix 3 14 29 Fix 2 Norm Selecting one of the two available settings Norm 1 Norm 2 determines the range in which results will be displayed in non exponential format Outside the specified range results are displayed using exponential format Norm 1 107 gt Ixl Ixl 2 1097 Norm 2 10 gt 1 Ixl 107 Example PREY 1 200 5 x 10 Norm 1 0 005 Norm 2 51ab c 6 dc Specifies either mixed fraction ab c or improper fraction d c for display of fractions in calculation results 7 Simp 1 Auto 2 Manual Specifies automatic or manual simplification of fractions When manual is specified fraction calculation results are always displayed as improper fractions e
14. d decimal form L 6 n 0 5235987756 2 6 2 0 5235987756 V2 2 x V3 V6 ov3 5 913591358 EID Q ge 2 65 EE 20 N38 V6 2V3 fe 5 913591358 Important Depending on the type of calculation result that is on the display when you press the key the conversion process may take some time to perform With certain calculation results pressing the key will not convert the displayed value You cannot switch from decimal form to mixed fraction form if the total number of digits used in the mixed fraction including integer numerator denominator and separator symbols is greater than 10 Note With MathO pressing instead of after inputting a calculation will display the calculation result in decimal form Pressing after that will switch to the fraction form or x form of the calculation result The V form of the result will not appear in this case Basic Calculations Fraction Calculations 241 1 233081828 7 3 2 6 6 or 5 2 3 65 EB 1 2 EE 1 L 4 3151 10001026 5 To switch a calculation result between improper fraction and mixed fraction form Press Note When manual fraction simplification is specified this operation is disabled and fractions are always displayed as improper fractions To switch a calculation result between fraction and decimal form Press Fen E 8 Percent Calculations Inputting a value and pressing causes the input value to become a percent 150 x 20
15. ecify the divisor if you want An error is displayed if a fraction cannot be reduced Note This function is disabled when Auto is selected for the Simp setting on the setup menu See 7 Note Using functions can slow down a calculation which may delay display of the result Do not perform any subsequent operation while waiting for the calculation result to appear To interrupt an ongoing calculation before its result appears press E 12 Examples LA To calculate 8 x 2r to three decimal places Fix 3 3 Fix 3 LineO 8 x 2 7 GB 50 265 Matho 8 X 2 CE 16r F D 50 265 2 To calculate 105 x 0 12 10 5 5 K 0 12 E 12000 4 1 2 x 109 1200 1 2 Dd 10 z3 3 E 1200 322 81 3 x 2 EE 2 EE 81 52 25 5 03 25 4 1 0 25 LineO 4 227 0 25 MathO 4 22 bur 0 25 To calculate V2 x 3 3V2 4 242640687 to three decimal places Fix 3 SETUP 3 Fix 31 O TE a 2 X 3 4 243 Matho 2 qe X 3 3v2 4 243 La To obtain three random three digit integers 1000 459 48 117 Results shown here are for illustrative purposes only Actual results will differ 5 To generate random integers in the range of 1 to 6 r1 Bani Ranint 1 suey 72 6 5 2 6 1 Results shown here are for illustrative purposes only Actual results will differ VA To perform the following calculations when Fix 3 is selected for the number of display digits 10 3 x
16. mber function RanInt Attempting to simplify a non fraction value Simp Action Input only integers for the argument RanInt Input only fractions for the argument gt Simp Can t Simplify Cause Attempting to simplify a fraction using a divisor that cannot be simplified Action Input a divisor that can be simplified Before Assuming Malfunction of the Calculator Perform the following steps whenever an error occurs during a calculation or when calculation results are not what you expected If one step does not correct the problem move on to the next step Note that you should make separate copies of important data before performing these steps 1 Check the calculation expression to make sure that it does not contain any errors 2 If the above steps do not correct your problem press the key This vvill cause the calculator to perform a routine that checks vvhether calculation functions are operating correctly If the calculator discovers any abnormality it automatically clears memory contents For details about initialized settings see Configuring the Calculator Setup 3 Initialize all settings by performing the following operation 1 Setup Yes E 16 Replacing the Battery A low battery is indicated by a dim display even if contrast is adjusted or by failure of figures to appear on the display immediately after you turn on the calculator If this happens replace the battery with a new one
17. nt memory Both types of memory acts like containers for temporary storage of a single value Ans Memory Stores the result of the last calculation performed Use this memory to carry the result of one calculation on to the next Independent Memory Use this memory to totalize the results of multiple calculations Hi How can I return the calculator to its initial default settings Perform the following operation 1 Setup EE Yes Hi Is there anything I need to remember to display a fraction calculation result as a mixed fraction On the setup menu select Auto for the Simp setting This will enable the ab c setting on the setup menu You can toggle display of a fraction between improper fraction and mixed fraction by pressing When Manual is selected for the Simp setting fractions are always displayed as improper fractions E 18 CASIO COMPUTER CO LTD 6 2 Hon machi 1 chome Shibuya ku Tokyo 151 8543 Japan SA1112 A 2012 CASIO COMPUTER CO LTD
18. press and then use and to scroll the input expression Using Values and Expressions as Arguments A value or an expression that you have already input can be used as the argument of a function After you have input for example you can make it the argument of V resultin in af g g 6 To input 1 and then change it to 1 VEA L S ge Ri 6 Math 1 7 6 142 l n s As shovvn above the value or expression to the right of the cursor after pa INS are pressed becomes the argument of the function that is specifled next The range encompassed as the argument is everything up to the first open parenthesis to the right if there is one or everything up to the first function to the right V2 107 etc This capability can be used with the following functions 07 vm 227 7 Correcting and Clearing an Expression To delete a single character or function Move the cursor so it is directly to the right of the character or function you want to delete and then press fen To insert a character or function into a calculation Use amp and to move the cursor to the location where you want to insert the character or function and then input it To clear all of the calculation you are inputting Press Toggling Calculation Results Each press of will toggle the currently displayed calculation result between its fraction form and decimal form its V form and decimal form or its x form an
19. s See 1 101 Exponential function See 22 X x Vm 1 Powers square root and reciprocals See s Note The following functions cannot be input in consecutive sequence x x x If you input 2 x 22 for example the final will be ignored To input 22 input 2 x3 press the key and then press 22 Rani Generates a 3 digit pseudo random number that is less than 1 The result is displayed as a fraction vvhen MathO is selected See La Ranint For input of the function of the form RanInt a b which generates a random integer within the range of a to b See 5 Rnd The argument of this function is made a decimal value and then rounded in accordance with the current number of display digits setting Norm or Fix With Norm 1 or Norm 2 the argument is rounded off to 10 digits With Fix the argument is rounded off to the specified digit When Fix 3 is the display digits setting for example the result of 10 3 is displayed as 3 333 while the calculator maintains a value of 3 33333333333333 15 digits internally for calculation In the case of Rnd 10 3 3 333 with Fix 3 both the displayed value and the calculator s internal value become 3 333 Because of this a series of calculations will produce different results depending on whether Rnd is used Rnd 10 3 x 3 9 999 or not used 10 3x3 10 000 See He Simp This function simplifies a fraction using the least divisor You also can sp
20. t be 10 digits or less including division marks jla b c lt 1x10 0 S b c The display seconds value is subject to an error of 1 at the second decimal place E 14 Ranint a b a b lal lb lt 1 x 10 b a lt 1 x10 1 9999 nis an integer e Precision is basically the same as that described under Calculation Range and Precision above e x type function requires consecutive internal calculation which can cause accumulation of errors that occur with each calculation Error is cumulative and tends to be large in the vicinity of a function s singular point and inflection point e The range for calculation results that can be displayed in x form is Ixl lt 10 Note however that internal calculation error can make it impossible to display some calculation results in form It also can cause calculation results that should be in decimal form to appear in x form Errors The calculator will display an error message whenever an error occurs for any reason during a calculation There are two ways to exit an error message display Pressing or to display the location of the error or pressing to clear the message and calculation Displaying the Location of an Error While an error message is displayed press amp or to return to the calculation screen The cursor will be positioned at the location where the error occurred ready for input Make the necessary corrections to the c
21. tup Initializing the Calculator Perform the following procedure when you want to initialize the calculator and return the setup to their initial default settings Note that this operation also clears all data currently in calculator memory 3 All Yes Safety Precautions N Battery Keep batteries out of the reach of small children e Use only the type of battery specified for this calculator in this manual Handling Precautions Even if the calculator is operating normally replace the battery at least once every three years LR44 GPA76 A dead battery can leak causing damage to and malfunction of the calculator Never leave a dead battery in the calculator Do not try using the calculator while the battery is completely dead The battery that comes with the calculator discharges slightly during shipment and storage Because of this it may require replacement sooner than the normal expected battery life Do not use an oxyride battery or any other type of nickel based primary battery with this product Incompatibility between such batteries and product specifications can result in shorter battery life and product malfunction Avoid use and storage of the calculator in areas subjected to temperature extremes and large amounts of humidity and dust E 2 e Do not subject the calculator to excessive impact pressure or bending Never try to take the calculator apart Use a soft dry
22. ven if the fraction display format setting is ab c Even if the result of a calculation can be displayed as a fraction when automatic simplification is used performing the same calculation with manual simplification may produce a non fraction decimal result Example 2 x 5 Simp 1 Auto 2020308501688 gt Simp 2 Manual 398 zz 2 65 2 3 65 5 0 1 8 gt 7 4CONT Adjusts display contrast See Adjusting Display Contrast for details Initializing Calculator Settings Perform the following procedure to initialize the calculator which returns all settings including setup menu settings to their initial defaults 1 Setup EE Yes Inputting Expressions and Values Basic Input Rules Calculations can be input in the same form as they are written When you press the priority sequence of the input calculation will be evaluated automatically and the result will appear on the display E 5 L 4 x 30 10 x 3 240 4 x 30 4 10 4 3 Ax S0 10 3 c 240 1 A multiplication symbol x can be omitted when it occurs immediately before an opening parenthesis immediately before Rnd or RanInt function that includes parentheses immediately before the Ran random number function or immediately before independent memory M or r 2 The closing parenthesis immediately before the operation can be omitted L Input example omitting X and D
23. y than the negative sign inputting 2 x would result in the squaring of 2 and then appending a negative sign to the result Always keep the priority sequence in mind and enclose negative values in parentheses when required oth 6th Multiplication where the multiplication sign is omitted 7th 1 Multiplication x division remainder calculations R 8th Addition subtraction E 6 Inputting a Calculation Formula Your calculator lets you input calculator formulas using the same format as they appear in your textbook natural format Fractions and special functions x2 x Vm x 10 are also displayed in a natural format P ves mz ga 63 amp 469 7 997259999 Matho ga gp 165 HT Important Certain types of expressions can cause the height of a calculation formula to be greater than one display line The maximum allowable height of a calculation formula is two display screens 31 dots x 2 Further input will become impossible if the height of the calculation you are inputting exceeds the allowable limit e Nesting of functions and parentheses is allowed Further input will become impossible if you nest too many functions and or parentheses If this happens divide the calculation into multiple parts and calculate each part separately Note When you press and obtain a calculation result part of the expression you input may be cut off If you need to view the entire input expression again
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